You could fix those three issues and see what happens. It could grow into something, but me personally, I'd start over. But first do the research and get some lights. I recommend the search button, top right hand corner.
Well I mean... There's nothing TO harvest really...
If you want you can keep going and see if that bud fattens as the pistils turn brown but imo you're getting maybe 1 gram of dry flower IF you're lucky.
Like other mentioned, you should first get a decent grow space/equipment and only then should you worry about growing
Well, here at last, dear friends, on the shores of the Sea comes the end of our fellowship in Middle-earth. Go in peace! I will not say: do not weep; for not all tears are an evil.
you came here after being involved in a Car accident where your car was completely crumpled by a semi truck.
you take your crumpled mess to your local mechanic and tell him to replace nothing and panel beat it back into shape.
had we been in at ground level we could have told you to avoid the Semi truck, given you a full detail and oil change and got you back on the correct highway!
Coming to us at the end of your journey means we can pretty much do nothing accept cut your losses and start again.