Entrants Database

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hi everyone 🙂
I have confused myself !

I have a group (actually a number of serperate groups) of 12 members who each others league weekly in an external Mobile App.

I want to have a table where members can tick/select a box to show they have joined a league….. so visibly it might be a 12×12 table with member names down on side and League names across the top.
Ideally the box would change colour when ticked and the membername would change colour when that member has ticked all 12 boxes.

I am sure there must be a plugin that will do what I want but I have looked at a few and can’t see one.
Can anyone point me in the right direction ?
OR am I on the wrong track !