Not trying to scare anyone off, but its very easy to get seriously injured doing squats and deadlifts if you don't have the right form and try to lift a lot of weight.
So if you are considering doing them, I would recommend that you go light. Actually, scratch that – I would recommend that you do the single leg varieties. Not only is it more “functional”, it gives you the same results while reduction the chances of spinal injuries.
Another thing to watch out for is muscle balance. With me for example, possibly due to my desk job, my quads are more developed than my hamstrings. This has led to instances of me pulling my hamstrings while sprinting.