bath rough

Good morning everyone. First time posting in a forum so bare with me. I'm using old closet space to add master bathroom and I'm unsure of some fittings and the correct use of them and where the wet vent can go for my situation. I laid out the fittings and took a few pictures I added here...

Sorry but I'm not familiar with "forum educate" never done this online stuff before. But anyways I'm looking for help on how to lay out the DWV and venting for a basement bath. My home came with a toilet (all by itself) in the basement. Cast hub 4" plus it was 2" vented as you can see in the...