I'd leave those leaves on. They power it's growth. You'll only hurt your yields if you take away it's solar panels.
They'll yellow up as it comes closer to harvest.
Don't be too concerned with yields this run. Just enjoy the fact you achieved your first harvest. Some get heaps some get a so so amount. I got about what you have on my first attempt.
Look into manifolding/mainlining, scrog and LST for next round. You can get nice wide plants that make better use of their horizontal space. And only start stretching vertically once they hit flowering.
Example of one that has been manifolded and scrogged. She's under a foot and a half tall. And closer to two feet square.
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I am really interested in this method i need to look into it more
-Edit- don't use 1" metal mesh for a scrog. Its a pain in the arse to rethread bud sites where you want them. Go for something more flexible instead. Probably even better to have 2" holes as well. -Edit-