Betta Fish: Tank glow up before, during and after

I hate to admit that I bought a betta impulsively because I saw a $15 fish tank on Facebook marketplace (first picture). I filled it with plastic decor, but soon learned about the 5g minimum and updated him to a 5 gallon I found on marketplace (second picture). Soon after he started fin nipping and the beginning signs of fin rot and I did more research and finally came to terms with the fact that my penny pinching wasn’t going to cut it. I finally upgraded to a shallow tank and removed all plastic and put in live plants. I will add more plants eventually but I am so happy with where it is at. His fins have new growth and I’m working on getting him up to a healthy weight while also not gorging him exclusively.

I am open to any constructive feedback on any additional upgrades that are needed!