I honestly think you are on the right track if you are hitting a wall. Most artists hit it.
You have a few choices: continue or move on haha.
The benefit of continuing is that you will eventually finish and earn the rewarding satisfaction of completing the project.
If you decide to continue set a realistic goal for what “finished” means. Then just chip away at it daily or consistently.
Keep up the good work. Often looking at inspiration helps me push through the grumbles.