Quick note, you need to get use to that beginner frustration stage.
Japanese isn’t like most topic, the learning curve is super slow so don’t stress yourself.
If you want to see some progress quick, the most rewarding book and praised by almost everyone is “Genki I”. It gives you access to the beginner level of japanese without any trouble.
Bunpro is good but if you are a complete beginner with the language you are jumping too many steps in my opinion. Same for japanese 101… it’s nice but you should cover some basics before jumping into it.
Also take some time to read this article :
You will get a better understanding of what to do and why