Don't rush into success in training. Dogs must be corrected and guided correctly when they are not doing well. If you do well, you can reward some snacks, or say something encouraging. Anyway, you should be patient and interactive.
Shiba Inu will shed its hair and tend to be greedy for everything, but the owner must hold back, because I have had personal experience myself. Shiba Inu couldn't help feeding it when he wanted to eat, and then his hair loss became worse and worse. I thought he was ill at first, but then I took him for a check-up. There was nothing unusual after the check-up.
The vet said it might be caused by improper diet. Later, I tried to stop feeding dogs and eating people. I give it a more balanced diet every day. The main dog food is "greedy natural dog food". Even if it begged for food, I didn't let it eat. Later, after a while, the serious hair loss area recovered!
The above is personal experience, I hope it will help you, and I hope to adopt it!