Sex advice

So recently my boyfriend and I did an@l..and surprisingly I liked it and want to do that again. I have had some negative experiences with it in the past so I was glad I didn't panic or freak out. I think it helps that him and I have a really good connection with each other. My question is what are some good tips or tricks to help with that? As far as in not sh*tting during that, best kinds of lube, toy recommendations to use to help get used to it more, and how to not feel as sore afterwards. Thank you!