does anyone know how to reach the G-spot

The male or female g-spot offer a bit of extra intensity during sexual arousal — they're things that make orgasm a bit more intense, for many people, and some even get to achieve orgasm just from stimulating their g-spot or having their g-spot stimulated. 

For females, the way to find the g-spot is by inserting a finger or two into the vagina and feeling along the vaginal wall that is located more closely toward the abdomen rather than the back. Look out for a soft, pliable "bump". It's the only thing like it in the vagina, so once you go looking, you will definitely find it. It may be easier to find during certain parts of your cycle. 

I honsetly have no clue, i think you only reach it through sex...

There are various ways. A number too long or probably not suitable for a forum!

Every G-spot I've ever felt has had soft ridges on it and it's located just inside the vagina near the front of the body. Basically, imagine that you're lying on your back and someone is fingering you with their middle finger, palm up. If they then curl their finger up towards the ceiling they will hit your G-spot.

I guess you haven't watch porn before or done it yourself. Psh

the best way to find your g-spot is to insert two fingers into your vagina and press up toward the roof of it kind of in the direction of your belly button once your doing that you want to feel around for a spot thats stiffer and a little flater than the rest youl know if youv found it if you feel a intense sensation when you press agenst it or rub it.

What happens if we can't reach it? How can we reach it?

Its close to the oppening. its the part which feels the best babe you will know. plus when u touch it it feels like you gonna piss. just ignore thst and piss baby all you want you will see thts the g spot stimulation and squirting orgasm.

As for learning how to masturbate better:  No pun intended, but if you stick with it, these things come in time. The brain is really good at figuring out what feels good, and losing what doesn't work so well. Sex feels good for a reason; we are SUPPOSED to like it. So, like anything that we are driven to do again and again, we LEARN how to make it work better over time. You might consider shifting your focus away from your clitoris for a bit, and onto somewhere else beyond the obvious -- nipples, belly, inner thighs. Slip a finger or two inside yourself to massage your G-Spot. It is the rough-feeling place just at the upper inside of the front end of your vagina, kind of  "behind" your clitoris. It sort of feels like the roof of your mouth. This rough spot is meant to excite both you and your lover (Nature is assuming it's a male here) by stimulating the coronal ridge of his penis to bring him to orgasm so he will ejaculate his sperm inside you. But you can massage it yourself to lovely, intense effect, and bring yourself to orgasm from this alone. In concert with your clit and nipples etc., you should be able to get there on a regular basis.

By the way -- a note about squirting.  Not all females ejaculate to that degree or in that way. If your body IS capable of that, it will likely happen as you achieve your orgasm. As you reach your orgasm, push "out" and "down" as if you were trying to pee. (It helps to sit with a towel under your buttocks.) When you orgasm, you might just squirt! That fluid serves to lubricate the area (and the penis that might be entering you) to make things go a little smoother. But it is not absolutely necessary, as the vagina manages to lubricate itself without that, and not doing so is not a failing or a shortcoming in any way.

But remember, your orgasm is not just driven by your clit (or your nipples, your belly button, your anus, your mouth) or even your G-Spot. In short, the physical sensations you create with your fingers are only a PART of what goes into your orgasm. Most of it is actually in your head. Your BRAIN, your MIND really drives your body when it comes to orgasms. The brain takes the sensations you create and mixes them with memories, fantasies, images and other stuff in your mind to begin the process that culminates in orgasm. A lot has been written about that, here and elsewhere, but it bears repeating. Orgasm is a delicate dance you do with yourself. Lots of things go into making it happen, including strong feelings of love for a partner. Lots of things can also get in the way -- subconscious fear of punishment, thoughts of being "bad", etc., even desires for a particular, absent partner can distract you or detract from the pleasure you want and deserve. You may need to give yourself  PERMISSION -- the freedom -- to have and enjoy the screaming orgasm(s) you deserve.

So, keep exploring the sensations your body can create, and Good Luck!