Is my tank too crowded?

Hi all! I’m getting my 20 gal tank ready to house my first betta fish and I’m wondering if I went overboard with the structures. I wanted to give my betta ample spaces to hide and play around but I don’t wanna to be cramped even if I’ll just have the one. (also please ignore the glow gravel. I was gonna go with a darker theme for the tank but now it’s too late lol)

Any advice is appreciated :)