Note: Everyone's bodies, interests, and experiences are different, so not all of these will apply to you. Feel free to take what you want and leave the rest.
Just make sure you communicate with your partner(s) and always have consent. "A little hack if you have a gag reflex is to just squeeze/press down your thumb with the rest of your fingers.
It stops you from gagging and choking." —nicoleees11 "Lube. For the love of god, don't be afraid to buy lube. It will make that one position soooooo much