Imakuni? in Pokemon Black/White style

[Hoeloe]

I will start making customs, but not right away.

That's a bad attitude to have. Customs are harder than edits or recolours, but the reason you should do them first is precisely BECAUSE they are harder. Making a good custom sprite requires understanding of form, weight, anatomy, shading and colour, among other things. Without these, your edits will only ever look sub-par. While you CAN learn these by editing, it's a lot slower than if you learn them by making custom art.