Qualification:
I have never been to such festivals, but recently I wanted to try. Do you have any advice and stuff?
Second question: If anyone knows how to get to niche festivals about anime or anime games, I will be happy if you share your ideas, what I should do to get there, etc
Yes of course, if you are into Anime.
I have been to a comic con. It was fun. You have to take a look at the schedule of events and go see the events you want to see. Also depending on the size of the con, you will have to get a ticket to get in and reserve a spot for a particular event. Most Cons take place over three or four days, so check out the schedule of guest speakers and events and go see the ones that interest you.
For example the con I went to had Wendy and Richard Pini as the featured guests. I couldn’t get a Reservation to see them.