Don't quit is #1, surround yourself with knowledgeable instructors is #2, don't ever quit is #3,lol. Never too out of shape to do something and most places will modify your workouts.

I will tell you I was super intimidated and waited longer than I should have to join because of the same thoughts you are having. I am not a small girl still and there are some skills I can do better than others, but just go and try it, you will surprise yourself. The only regret I have is not joining sooner

Good coaches will show you how to do things properly. If they think you are struggling or have bad form, they will help correct it and/or modify whatever you're doing until you can do it as it should be done. There is a lady at my box that started a couple weeks ago and she is doing step ups on the box instead of box jumps. She is doing lifts with two little dumbbells instead of using the weight bar when we do bar work. She is starting somewhere and will progress....she pushes even though she cannot do much right now and she knows she will get stronger.

Please don't stress about it and just do what you can. Everyone -generally- is very supportive at CrossFit, which is something I've never really experienced before in a "gym" and I'm seeing more of the same from what other people say here at their boxes.

Don't quit is #1, surround yourself with knowledgeable instructors is #2, don't ever quit is #3,lol. Never too out of shape to do something and most places will modify your workouts.

I agree the main thing is not to quit and to stay with it. At first you'll be last alot and you probably won't be able to do alot of the movements. You've just got to stay with it and keep grinding.

Just go.