Hey, we all start from somewhere. Just a couple of points,
1. u are not planning on co2, so perhaps it is better to remove that bubbler.
AFAIK bubbler will increase o2 in the tank which is good for the fish, but
kinda not so good for plants.
2. just a suggestion, clumps your rocks together at a few location would give
focus points in the tank.
just some suggestion and in no way judging u. in fact, your tank is a lot better
than when i started out.