It's going to be for 1.12.2 as that's the newest forge version. And a folder filled with the models and blockstates or whatever should do just fine thank you!
Yeah totally I can add stairs, slabs, fences, walls, etc. Basically anything in vanilla I can for sure do! Send them over or just post a link to them when you're done and I can get to work on them!
I've been trying to make one actually. I'm trying to change my 4x4 pack to work on Windows 10 also but windows 10 actually lacks features and is more complicated than java version. You actually have to make a few more files than usual and the textures have to be default resolution where java can be any resolution divisible by 4. It's really frustrating as I now have to resize every image without stretching the textures.