They say that Finnish and Hungarian are similar languages.... true.. and certainly they are from linguistic family, but German and English are also from the same language family and they are both extremely different langauges.
I would not say Finnish and Hungarian are necessarily similar. Finnish and Estonian are incredibly closely related.
That being said, there are certain Finnish words that are similar to Hungarian words.
For example:
vér in Hungarian means blood and in Finnish, the word is veri
Eleven in Hungarian is alive, and in Finnish, alive is elävä
To go is menni in Hungarian, and mennä in Finnish.
etc. etc.
So! If you wish to learn Hungarian, be prepared for it to be difficult, but it certain will help knowing Finnish... :-)
Good luck! Don't let the difficulty of a language dissuade you from learning it.