Im new explain sumin to me.

Ok im playing as a ranger on the rp. im now lvl 3 after about 3-4 hours

I want to join a guild and play battles but do i have to go on PvP mode and make a new dude to do this and will anyone even let me in there guild, thanks

Finding a guild shouldn't be too difficult, finding a guild which you like might be a little more difficult though.
As for PvP, as a level 4 you won't be accepted too easily to do PvP, so a PvP-character will be required most of the times .

Here's one idea: Play around in some random arena games (no Guild needed), with a level-20 PvP character. There are pre-set builds you can try, or you can search this site for builds.

He will have to do RA if he wants to unlock any skills or runes

Finding a guild: Easy
Finding a good guild: Difficult

Example of guild problems:
I gave up on guilds after the few I was in died out due to poor leadership. Unfortunatly, I was the downfall of one guild, as a few people acted like I had to be there in order to win(I understood GvG well and lead our team to several victories). I was essentially the monk "trainer"... we had one other guy who played monk frequently and it was my job to train people who had never done healing before. Well, I went away for a few days and came back to find the guild almost completly disbanded. They got antsy and went into GvG without me(which I didn't mind) but then fights broke out when they lost about why I wasn't waited for. It was pretty ridiculous, but I finally gave up on them and formed my own guild of only my friends.

Guilds of your friends are nice, but you won't GvG anymore :\

ya do this afer u unlocked a few items or get the hang of PvE.... but you jump right into PVP and skip all the PvE

The best PvP training is PvE. Create a PvP character the same classes as your current Ranger. Whatever you unlock in PvE will be available for your PvP character. You will have to remake him to get the new stuff though. Just delete and recreate with the same name if you like.

That's PVP unlocking, not PVP training. PVE isn't PVP training at all; in fact it's possible to cultivate bad-for-PVP habits from PVEing, if you aren't careful.

if ur new u should join another guild people of the same level as you and progress through the game together... then when you all become good you could have a few unrated GvG battles with other guilds to practise...then when ur good at that u could have start rated battles