Ideas for a Tic-tac-toe like extension wanted

Hello purple fellows,

i currently planning a viewer vs viewer game (overlay extension). I would start with something easy like a Tic-tac-toe game but i’m interested in your ideas/best practices on how to do so.

As my background comes from java/php backend development my personal choice after some readings would be a websocket (maybe nodejs) solution instead pulling data for the viewer time based.
On how to build the frontend i’m pretty much clueless if there are any nice tools to build this in an easy way.

Let me know what your experiences are and what you would use for a project like this.
Maybe you already did something similar and like to share or coop with me cause you like the idea.
Everything / Everyone is welcome.

Have a nice weekend