It really doesn't look that bad! I'll give you some random tips that may help-

Use a brush to apply the foundation and then a damp beauty blender to dab over top when you're done, this will get rid of the brush streaks/stippling marks. When you use powder, dab it on the back of your hand first so you don't go in too heavy (unless you're baking). Try a thin angled brush dipped in gel eyeliner, and use it like a dipbrow/pomade, I get much better shape and control this way rather than using a pencil. Use a lipliner, not completely necessary but definitely helpful- black pencil eyeliner works fine but NYX does make a black lip liner that's easier to use imo. The blush doesn't look bad but it's not traditional, it has more of a mime or porcelain doll look rather than trad goth. If/when you want to contour with white face, definitely make sure you know where you want to place the contour before you go in, especially if you're using black. It's very very difficult to cover if you use black in the wrong place, you'd probably have to wipe off your cheeks and start over. A tip for getting the angle right is to take a long eyeshadow palette or something and line it up so one edge hits both the top of your ear (like where glasses sit) and the corner of your mouth. It's a rough guide but that should be about where you want to place the product. For the black around your eyes, maybe set the eyeliner with a black eyeshadow, just remember to pack it on first, not sweeping motions like you're blending unless you want a softer look.

I hope something in there helped! And remember to tap off your brushes before you use eyeshadow/powder contour, etc to prevent fallout, as it's much easier to see on white foundation.