First time using a diva cup?

anyone have any personal experience they'd like to share? Needing advice. So

i don't use tampons & never liked them. I know this is a tmi thing. So my first try didn't work. i gave up. I googled it and sounds like a lot of people have a hard time inserting it. I am a big girl and 2nd try in the shower worked. Did anyone experience air going in/out? Can u pee with it in?