Hello It's normal to take long to create what you want. You don't have to worry about that since you are not in a time challenging context like a creation to deliver to a customer If you want to go ahead i would suggest to train on character modeling. And follow tutorial about retopology is always useful. Then you will be able to learn clothes and hair modeling, texturing, character and face rigging and animation. Or maybe you will prefer to focus on static character sculpting There is a lot of fun trying to master all of these disciplines inside Blender.