I'm looking for a Minecraft team, does anyone know of a good forum where I can post an ad by describing that I'm looking for a Minecraft team etc.
Unfortunately I can't help you because your information is too imprecise. Therefore I ask you to ask your question again more specifically and to formulate it differently.
What is the best way to build a Minecraft team. So on which portals can I request developers etc.
If you want to have a developer for your own and small Mc server I could help you but there are minecraft forums like https://minecraft-server.eu/forum/. And otherwise ask your friends if you would like to participate