I absolutely 100% get that wish
I have only been tangentially in contact with gang bangs where I left before any actual fucking happened. At the time my limit was flirting a bit and playing strip poker to underwear before bowing out.
Now I share your wish to be more involved, ideally as a bottom.
My tips (largely from what I heard from the friends who host the gang bang parties) are as follows:
Be sure you trust the people and you feel respected
Establish acceptable kinks ahead of time
Safety first
As tempting as it may be to be the sole bottom for everyone, it is helpful, especially for beginners, when there are more bottoms and ideally the match up of tops to bottoms is 1:1 or at the absolute most 2:1 for a first time (this one is taken verbatim from one of the friends hosting)
And lastly, honestly is just staying safe and having fun. There is really no shame in just jumping in and deciding how far you wanna go while youre at it. You can always leave if you change your mind while getting i to it
I'm really interested how this works out for you. Keep us updated if you feel comfy