Odd Man
Thru Hiker
I absolutely would not do Oly at a Cross Fit box unless you happen to find an experienced coach there who will train you one to one outside the class. Olympic lifting is very technical, that's what I like about it. I see so many PTs training people to lift bars with horrible dangerous posture. The coach has to know the sport really well and be able to teach good progressive exercises to help build muscle memory to adjust whatever one is getting wrong. You can really hurt your back or shoulders if doing it wrong. Remember, it's explosive! Totally different to other lifting.
I completely agree. Choose your coach very carefully and pick someone who does it as the main discipline. Some boxes have poor (Crossfit) coaches (like mine which caused me my hip injury), but the box's Oly coach was very experienced. He coached the regional Oly competitors in London. If you can find a Oly club near, better, but they are rarer than boxes unfortunately.