I like Cute girls doing cute things
Lucky Star, Yuru Camp, Azumanga Daioh, Ninin ga Shinobuden, K-On!, Manabi Straight, and Bocchi the Rock are all good. I don't remember how quickly they speak, though.
I rather enjoyed Jahi can't be defeated, and World Conquest Zvezda Plot. anything in that vain would be appreciated.
Uhh... Excel Saga? I haven't watched Zannen Onna Kanbu Black General-san, but the manga is great. Those are the only two I can think of.
Katanagatari sounds interesting I suppose I could give dragonball a try
Definitely do. Katanagatari is only like 12-13 episodes, and there's a reason Dragonball is considered one of the greatest series of all time.
Since you haven't watched Dragonball, I'm just going to rec some of the best ones I know, just in case. Not all of them are shounen, but they're all great. You can just look them up and see if they seem interesting to you. I have no idea how advanced they are, though, because I watched most of these ages ago and I only started learning late last year. I haven't started with immersion myself, yet. I want to finish the beginner word schedule in Renshuu first. Only another two or three weeks.
Yu Yu Hakusho, Hunter x Hunter, Gintama, Trigun, Cowboy Bebop, Slayers, Dot Hack Sign, Air Gear, Rurouni Kenshin, Beck, FLCL, Musekinin Kanchou Tylor, NHK ni Youkoso!, Read or Die (the movie, though the sequel anime is also pretty good), and Sakigake!! Cromartie Koukou.
There's probably others that I'm forgetting, but this should be plenty. Honestly, though, I'd check the Learn Japanese subreddit. Odds are a few dozen other people have asked for anime recs for immersion over the years.