I have a 24 gallon
JBJ Nano. Make sure you look around and get a good price. And if you can wait keep looking here I see them for sale all the time.
I like the JBJ except for the hood. I took mine off and replaced it with one that sits about six inches above the water. I don't have that much experence but I know that this advice will stand up. "Take your time". Don't buy live stock till your tank is ready. Don't listen to LSF (Local fish stores) that tell you that it is ok to add something before you have looked into it yourself.
Ask questions here.

Everybody loves to share thier experences. A more helpfull crew I have never seen.
And welcome to TRT.