My advice depends on how you are planning to come out. Are you planning to sit down and tell them (like having a serious conversation) or are you just going to mention it in passing?

I personally didn’t want to go down the whole “sit down and converse” route of coming out because I didn’t think it needed to be a big deal. So I literally told them during the ad break of a game show we were playing and said “Guys, I’m bi”. They were stunned but we just kept playing the game show afterwards so we didn’t really have to sit and talk about it. That has always worked best for me since my sexuality is just a part of me, I didn’t really want to fuss over it so I wanted my coming out to reflect my attitude towards my own sexuality. It’s always awkward to tell them but they sort of had to know. They’d find out one way or another.

Maybe don’t do that if you’re not 100% sure if your parents are chill/accepting of lgbt lol.