Okay let me see if I can help you out. I would recommend to get better lights, especially vegging for as long as you have. Your plant will stretch a lot in flower and will need more than some 23w cfl’s. As far as the browning your seeing it looks to be a ph issue also 3 months in with no nutes I bet she’s hungry. Just get a ph meter and some ph up and down. Correct the ph before you water, then check your runoff. Also get a humidity and temp reader and keep a good environment. It also looks a little overwatered so make sure not to drown it. Don’t worry it’s not the end, cannabis is a very strong plant. Just get some lights, get some nutes (go very light on dosing at first) and keep your ph in check. Good luck and happy growing!