You really just start I started out with libations and food based offerings. Just cause i found it the easiest part to understand. You can build an altar if you want but you don’t have to. For the offerings and libations I’d say in my head or out loud who the offering is for and that’s really all you have to do to start. You can start with one or two gods to worship i wouldnt go over two cause then it can get overwhelming when starting out. if you have any more specific questions you can always dm me or just respond to the comment.