How long to learn?

[scafpilot]

For a new guy, How long does it take to gain a basic understanding and proficiency level in bjj/gjj? I have limited experience in wing chun and muay thai (6 months), and would like to continue both and add jj. Anyone know of a place in Sacramento CA to do this (all three)? I'm a division one college athlete (retired) redirecting my need for competition. I'd like to train 3 times a week. The Air Force pulled me away for 2 years but I will be back in April. Thanks for any help guys.