I am around half way through the tree so far, but one thing I am really struggling to get my head around is plurals. I have tried to read and re-read many explanations but unfortunately my brain does not want to listen to them.
I was hoping someone could share some good links maybe that might help me out.
For ett words, it's pretty easy:
ett word ending with vowel -- -n (äpple/äpplen)
ett word ending with consonant -- no ending (tak/tak)
For en words there are several possible endings (that depend on phonetics)
words ending with -a -- -or (myra/myror)
words ending with consonant, long vowel, or unstressed -e -- -ar (dag/dagar, pojke/pojkar) words with last syllable stressed, often several syllables -- -er (monarki/monarkier, tid/tider)
words ending with a vowel -- -r (sko/skor)
words ending with -are, -ande, -ende, -er -- no ending (ordförande/ordförande)
some loanwords -- -s (slogan/slogans)
Words that end in -ning, add -ar (example övning --> övningar)
Of course then there are the verbs that change their vowels in the plural (bok --> böker) and the fun of definite plurals.
I don't have any good links but I would recommend picking up a grammar book. I just borrowed "Swedish Essentials of Grammar" by Åke Viberg, Kerstin Ballardini, and Sune Stjärnlöf from my library. It seems easy to follow. And I find the section breaking down the plurals helpful.
Oh yeah, I forgot about vowel changes in some basic words. These are easier to accept if you think about the same phenomenon in English foot/feet – fot/fötter (it happens in different words, though).
Maybe not the advice you are looking for right away but a lot of things (as I suppose is the case in any language) come with excercise and repetition. I have been in Sweden a few times - as a belgian - and it is greatly appreciated if you understand and/or speak the language, be it with quite a few errors in it. So just keep going like you are doing now and you are on the right track. Hang in there and things will come to you naturally :)