Welcome here, SárgaFa!
You can consider Lalaith en Noldor's words, because she speaks really good Hungarian, I met her
She taught me the expression Krcanin)
I have just looked around in the bookstore of foreign languages, and they have some good books that teach Hungarian for foreigners. Most of the books are mentioned by Lalaith above.
I have never studied them thoroughly, so I cannot say an opinion now, although Unilang and Hungarian learners were always in my mind
Otherwise, I know how you feel. I have similar issues with most languages I start to learn.
All I know is that, in the case of learning other Finno-Ugrian languages (Finnish and Estonian), it was of great help to learn the different stems of the word right at the time you learn a new word. It made a lot of things way easier than if you hadn't done it on time.
Then you'll know the conjugated forms of each word at once. And no need to be afriad of the "each Hungarian word has 98793875639532 forms!!!" cliché.
A big advantage of Hungarian (within the borders of Hungary) is the lack of living dialects. The pronounciation has no difference in spoken and literary language. Actually we speak the same way as in the television, which is not the case with Norwegian, German, English, etc... Yes, there are some villages with palóc and whatever dialects, but the majority speaks standard Hungarian everywhere.
You can just choose a radio-channel or a movie and you'll get the same Hungarian that we use every day.
If you ever plan to come here, let us know and I could help you in the bookstore in Budapest.