If you're learning to climb trad there are a lot of awesome spots slightly closer than the valley ... Jtree, Tahquitz, Red Rocks, Eastern Sierra. Just be aware, as others have mentioned, that trad climbing technique, both physical and mental, is very different from sport and bouldering. It's hard to replicate slab, chimneys, liebacks, and cracks in the gym. I mention this because I was climbing high 10's low 11's in the gym and malibu and thought, incorrectly, that would transfer over easily to trad. If you've never climbing trad start easy, like 5.5 easy, for your first climb. You might be able to find climbers in the valley that would want you to follow, but you'll likely have more luck if you have lead experience, trad experience, and start to build out a rack.