I just can't keep the characters in my memory...
The title says it all: Characters that I learned at the beginning of a lesson, I forget before the last question. They just won't stay in my head, like my brain secretly hates Japanese and is pushing it out. I can't remember a single character at all right now, after doing a lesson this morning. I usually don't have too much problem with keeping foreign words in my memory, but now my brain just seems to be giving up. Please help me out!! Thank you all so much!
^^^^^ I'm a big proponent of handwriting stuff.
I'd also second piguy3 that expecting yourself to remember this stuff after 40XP is... overly optimistic, tbh. Give yourself a chance to actually grab hold of them! 40XP is not enough time or effort or whatever to seriously expect yourself to have learned stuff unless you're a memory whiz and probably also very experienced with languages.
I absolutely agree with writing them out until it becomes muscle memory. The way I learned kana was to write the whole thing out, in Japanese order (gojuuon), every single day during every spare moment where could find a scrap piece of paper. The gojuuon in both hiragana and katakana was literally on everything in my apartment the first couple of year I started learning Japanese.
I recommend starting with hiragana and katakana practice sheets (there are several in PDF format online) then switching to genkou youshi (Japanese writing paper) until you feel like you have good sense of the proportions of each character. (Getting the proportions and "flow" of the characters right is important to legibility!)
Work top-to-bottom whenever you can. You'll have lots of opportunities to write left-to-right later -- it's better to get used to writing top-to-bottom early, and IMO starting at the top-right while sitting upright at a proper desk improves penmanship.
Do this everyday! If you don't have genkou youshi around and have to write left-to-right on ruled paper, that's fine. The important part is to write these out as often as you can until it becomes second nature to you.
This is the 五十音（ごじゅうおん） order of characters:
や ゆ よ
I see the Spanish and French flag next to your name, so let's compare the two to Japanese. Any new French and Spanish words you learn are not entirely new, because there is the part you already know about them; it's the alphabet that they have in common with English, and makes remembering them easier than those in Japanese. At a level as early as 2 in Japanese, the characters may look like pictures rather than letters (well, at least that's how I saw them when I was at a similar level), and you will be able to remember them easily after a while of continuous practice, so I think you don't need to worry. I suggest that you learn hiragana and katakana from an external source (like Tinycards) to be able to remember them faster. Good luck!
Are you using iOS? When I was starting out, I used the app "Dr Moku's Hiragana Lite" - it draws pictures using the hiragana which help you remember them better. I have long since deleted it but I remember す was Superman, に was a kneeling samurai, む was integrated into a cow (moo!) etc.
If you google "hiragana mnemonics" you probably find similar hints.
You've got 40 XP in Japanese. 40^2 is more the range you might well find yourself in before you're comfortable. I'm sure others will chime in with modalities they've found more effective than Duolingo on the specific point of learning hiragana. Essentially, the problem with Duolingo's version is that it's too easy: too much multiple choice where you can use process of elimination.
Easy way: Use pictures to help remember the sounds. To me, a lot of the beginning characters look like stick ninja characters. I imagine them kicking and punching while making the particular sound they represent. Also, you can make other images and create a quick one sentence crazy story to help as well.
For instance な (na) looks like a person knocking a piece off the other symbol while saying "na!"
や (ya) looks like someone with a whip saying "yah" like a cowboy whipping cattle.
ま (ma) I imagined as a snake (cobra) going up to people and asking "Are you my Mama?"
も (mo) I imagined as the hair and curl of hair that one of the Three Stooges had. I don't remember which one actually had it, but I can remember Larry, Curly and "Mo" who I imagine to have the lock of curl.
し (shi) this one was slightly hard to figure out a picture for, but I finally decided it was a mermaid (the curl is the mermaid's tail) and a mermaid is a "she" she=shi
So, you get the picture. (No pun intended.) The crazier the story, the easier it is to recall. Its worth it to stop and take the few moments or more to come up with the image.
へや (heya) "room". I imagine the song Andre3000 sang back in the day. that "hey ya" song. i see him singing that and also adding in "this is a room!" or "I'm in a room!" to the lyrics.
can use a similar sounds sentence to trigger memory: おやすみ (oyasumi) "goodnight". "Oh yea? Sue me if you want me to go to sleep."
hope this helps