Ever wondered why your drawing is not improving? It's because your spatial Intelligence is shit.
The most talented artists can imagine, for example, a memory palace where you can walk around slowly, look around left right and up, imagine themselves doing random activities in a room. If you cannot do the activity mentioned, you might be an NPC and are destined to never make it.
Sorry, the waifu you wanted to draw is just never happening. Drawing is not for everyone. So it's better to just find another hobby that doesn't require much thinking like lifting.