is it old enough to tell the sex? - Yes its old enough... but if the light cycle isn't at 12/ hours light and 12 hours dark... its not gonna show its sex. Just gonna have to wait a while. However, if you don't know how to sex it... and it IS showing its sex, heres a quick lesson in sexing. Look all over the plant for little ball shaped flowers. If it has them, then its a male. Look all over the plant for little narrow shaped flowers with white hairs coming out of them. If it has those, then its a female.
someone told me when its at 12/12 light cycle? when is that? - Depends on where you live. generally, it will be in a couple of months.
is their anything that i can do to make it like ultra grow? - In my opinion, its doing great. Don't try too hard. Right now, you're doing a good job.
can i clone it and still make the clone bud in time? - Yes, you COULD... but the clones will need time to grow roots. I wouldn't do that if I were you because there isn't a lot of time. You won't get a lot out of the clones this season.