questions about starting a webring! specificity/niche-ness & dimensions of widge

[maddy ੈ✩‧₊]

hi! i'm interested in starting a webring, but had a few questions i wanted to ask before getting into the weeds of it!

i was specifically interested in creating a webring for fans of the game rhythm heaven!
i am considering having it more broad to include other rhythm games as well since i'm worried about not really getting any members, but i'm worried about keeping the styling consistent/in theme.

is there a preferred/typical size/dimension for webring formats?
i want to make the widget as customizable as possible, but i'm interested in using premade sprites/images so wanted to see if there were default dimensions i should start off with!
also if anyone has examples of webring widget designs, pages, or anything i could take inspo from, would love to see!

i also wanted to know if there were any recommended ways of accepting forms for the webring? looking for a free service that i could embed/stylize onto a join page and get notifications for new entries!

also if anyone has any advice/tips on anything i haven't mentioned, would love to hear and just have it in this thread as a reference. thanks so much for your help!