My last piece of advice would be to find a decent trainer. A lot of trainers are great at training you to do incorrect movements. They'll give anyone the certification to become a personal trainer. There are a lot of guys being paid $10/hr at Planet Fitness giving advice that have no idea what they're doing. It may sound ridiculous, but start on Youtube. There are a lot of great videos of people teaching you how to squat and deadlift. That way, when you do sit down with a trainer, you'll have an image in your head of the motion you should be doing.
Originally Posted by aerie
And here is another important nugget of info - make the trainer do the motion! Compare their motion to the guys in the Youtube videos. If your trainer can't do it right, don't let them advise you!
Don't put your trust in anyone on this forum, including me. You are the key to your own success.