Need help newbie

Yes, flower now if you like. Plant will double in size (maybe more).

Once the preflowerss have shown its sex it is mature enough to flower.

Me personaly i flower at 24inches

Has she started showing preflowers yet?

No pre-flowers yet which I heard it can turn hermi( male and female)

Pre-flowers don't turn hermi. You'll do yourself a big favor reading up on what marijuana plants are about -- their life cycles, their needs, their quirks, and the things that can influence not just a good harvest but getting to harvest at all.

You can pick any one of a number of reasons to force flowering. For most people it's space. Look at your plant. If it doubles or triples in size, will it be bigger than your space? (not important if you're growing outside) At 14 inches at 2 months and 7/8 nodes, I'm guessing you have a sativa dominant strain (or the plant just hasn't had access to a lot of light) and if so count on tripling in flower.

Your plant is naturally ready to flower if you have alternating nodes and pre-flowers. Even then, flowering won't take place until the plant is on a 12/12 light cycle.

Good luck!

I would FIM it, then leave it to grow all summer.

Yeah I know the pre flower won't turn hermi and I know a hell of a lot about the plant I was saying the plant in general.today is July 18th and they now show signs of pre flowering and It's already been in the 12 12 cycle for like 4 nights

Looks like you have it all under control