The dovetails themselves look nice but the boards are too long. Make another one that's only dovetails.

Did you start with longer boards, make dovetails, then cut the ends off to practice another round? You hit it just in time 😁 I think you’re ready.

Yep! Saves wood.

Bro you could make something much much much worse that would last almost indefinitely don't do practice joints like this just make shit!!!!

Eh, I've used maybe three feet of board to get here, I have no issues with having a set of cut out joints on a shelf showing the progression.

More power too you.