My comments about seminar

Last Friday I attended the seminar group which had six students, I felt boring because I didn't understand someone in my group speaking and he didn't listen everybody.
Every time that I started to speak I used seminar language for example Yes, you're right,but... About my pronunciation I think now it's OK but in the next time I will try to more better than this.
Grammatical, it's very difficult for me and I don't know that I said it's right or wrong.
About vocabulary, in my opinion I should to learn academic words more than now.