This is not a feature provided by the API
Sure you could use channel points to let people “buy” into a team
But you’d need a developer to handle the processing of the purchases
But you may also be referring to predictions
https://help.twitch.tv/s/article/channel-points-predictions?language=en_US
So really you need to find someone to work for you to achieve what you want. The Twitch API and products only provide a fabric to achieve your end goals.
if won’t do everything you seem to need “outta the box”