I feel like a proud betta parent!

he is doing so well with the other fish! He actually came within less than an inch of one of my male guppies, and didn't pay him any mind. He is waaaay more active now. He swims slowly around the whole tank like he's doing laps

thanks so much again for your help! I never thought I'd have success with a male betta in a community tank! I will continue to watch for any signs of aggressive/territorial behavior and/or fin nipping with any of the fish. But for now, all seems to be going well!
Ps. Forgot to mention his name's Finnegan

his brother (in a bigger bowl with a plant) is Gilbert