I had a long reply written out, but then it got erased. 😓

I can't think of anything else it reminds me of, since we haven't really gotten to the actual plot yet. It's say watch episode 9, and see if you like that. It gives a sense of the silliness and seriousness we've seen so far without killing any previous set up jokes or finishing a fight, but it does have jokes and fights. If you like that episode, start from the beginning and give it a bit to get up to speed.

If you watched Gintama, I know you have the patience to give a show time to figure out what direction it's going to go.