I Can't Model For Shit (How The Dicks Do I Use XSIMT 7.5)

I can actually, but I have to use blender, which AFAIK can’t model for Gmod correctly.

Ive tried the tutorial video, but the prop in gmod shows that there is no texture for it. the collisions work fine, but the textures don’t.

I have XSI Mod Tool 7.5 but it’s confusing as fuck. I don’t even know where the hell to make a cube.

Ive tried looking for tutorials on how to model for source with Mod Tool, but I can’t even find the “create block” button when they say its in the “create” tab.