In regards to the irregular verbs, I was taught that the only irregular verbs are:
来ます [kimasu: to come] - dictionary form is くる
and verbs which have the structure
~します
(eg. 練習します [renshuushimasu: to practice] or 运転します [untenshimasu: to drive]
- dictionary form is
~する
I could very well be wrong though, since I haven't been studying Japanese for a very long time. ^^; But I hope that kind of helps.
It's really difficult learning the language without some kind of teaching. Self-teaching is possible, but it'd probably be faster/more efficient learning in a course or in lessons, and you'd probably have more exposure to the language.
Good luck with it though~
