hi new here

i all im ash im new here but not that new to the guitar i started playing when i was about 16 im 25 now but to be honest im not that good i can play i few thing but easy thing like ant it fun by gun and roses anyway i lost my job last year and i cant find anything in my chosen trade so i thought what the hell i wana play in a band and TRY and make some cash that way i want to play rhythm guitar as i belive this would be the best place to start i want to do things like black sabbath and metallica dark and heavy can u tell me what i need to learn to play rhythm guitar and how long it will take im hoping to be in a band within one year i have 3 hours per day to practice with and i will also be upgrading to full mambership when m,y cash clears any way thank for having me and io hope to see u all around