You can definitely learn here, i just dont think my mind is the same as other people cause i cant learn japanese :((((((((((((((((((
Japanese is a difficult language, you know. For native speakers of English, Japanese has been considered one of the most difficult to learn to any degree of proficiency. Yet, that doesn't stop the millions of us from learning it.
Do you want to know what separates those who successfully learn the language from those who don't? It's not about memory or how similar the language is to yours - although that can considerably affect how quickly you pick up the language - no, it's about MOTIVATION.
Even if you can't memorize a note you've written on the back of your hand, you can still learn a language. However, you must be motivated to do so. Think about why you began learning Japanese. Think about your goals. If you are PASSIONATE about learning your language, you WILL begin learning it, even if it is one word at a time. Pace yourself, and of course, stay motivated. Here are five lingots. Go to the shop and make that wager.
Good luck on your journey, and if Duolingo isn't working for you, there are many free resources on the internet!
Like Ficsean said, it's all about motivation. What makes a successful learner isn't talent or intelligence, it's drive and commitment - as long as you put in the effort, even the slowest learners can pick up a new language. You succesfully learnt a language when you were a kid (two languages even, if you're not from an English-speaking country) so you can do it again. Believe in yourself.
Learning the hirigana and katakana is the first major barrier of difficulty to pass. You should practice writing them as well as saying them (make sure to look up the stroke order). For the most part, they should all have very specific and fixed pronunciations. There are exceptions where you may omit a sound but mostly it's entirely phonetic (which compared to the English Alphabet makes it a hell of a lot simpler). I recommend getting a thick writing utensil (crayon, marker, chalk) and teach yourself the stroke order then eventually start writing it smaller with a pencil on a notebook. There's lots of easy hirigana words you can practice with like いぬ and ねこ. All the Pokemon names are spelled in katakana as well so they are very simple to learn and help you learn etymologies you might not have thought about otherwise.
While I agree with others that motivation is important, it is also important to understand your strength and weaknesses and type. Every language comprehends perception in a different way. Learning a new language is taking on this structure yourself. The more in-tune it is with your cognitive structure, the easier it is to learn the language. The reason Japanese is considered one of the hardest is because it's one of the most different. Even historically, Japanese developed completely separated from other languages (barring their written system, which was completely misused and became unique, ironically).
Motivation will get you through much thick and thin. However, we all inevitably fail at some part. It's important to remember that if you fail it's not necessarily because you're not motivated enough. Any level of motivation and dedication should be enough to learn language -- it should not be restricted to only the most committed. Believing that will hurt you in the long run, in more ways than one. It's good to realize that sometimes the reason you failed is because you're not built for something. You're just born or grew to be that way, just like some people take to Japanese easily. But realizing that is no reason to give up. The majority of people who learn Japanese as a second language did not find it easy. Fully understand why the language is difficult to you, and you'll will find ways to adjust to it. You will find ways to practice understanding Japanese mindset. And, with time, you'll find that it'll come to you easier. But progress is directly proportional to action. As long as you take action, you will see results; In time, much much time, you'll find that you suddenly understand more than you thought possible.
If you come back every day, and do some work, you will learn. It is just that simple.