Is that really from clone? looks like a stretched seedling.
-Regardless, welcome and GL on your grow!

What are the dimensions on your grow area?
Dont worry about age until you flower it.

Whatever the sqft of your area, you want 3000L per sqft in veg. check the box for the lumens on the lights.
-Up the lights to 20/4 or 24/0.

Dont flower yet, it needs more growth = light.
-In flower youll need 5000L per sqft.

I would finish out vegging in that pot, then transplant and flower.
-No nutes until it shows light greening. then 1/2str of that fish fert.