Meh, it's ok... I did my clinicals and some work at a nursing home, and some mistakes are expected when you're new and still learning the ropes. Worst mistake I ever had was transferring a resident wrong and he slipped out of his wheelchair and fell...thankfully he was OK and didn't have any injuries. Still, though, it made me feel horrible... it made me think just how much worse things could've been if he had seriously hurt himself. It definitely inspired me to be more cautious in the future.
Main things to keep in mind when you're new and still in the learning process are patient safety + infection control. You want to make sure of basic things like -- keeping a patient free of infection or skin breakdown, making sure they don't have a bad fall and hurt themselves, etc. Things like speed, efficiency, doing everything properly and correctly, etc. are only going to come with practice and time. It's frustrating because you WANT to be good and able to do everything for your residents, etc. but the sad fact of the matter is, it's just not gonna happen until you're experienced and know how to do the job. I felt the same frustration when I was brand new but I just had to deal with it.
When I did my clinicals, we had 4 days where we basically just shadowed a CNA and did little by ourselves, other than the basic, low-liability stuff like wheeling a resident and feeding. It was easy and low-stress for that reason, but also made me sort of ill-prepared for the actual job because I hadn't practiced skills on actual people that much. I had to learn most of the skills like bed-making, turning, cleaning and changing the residents, etc. on the actual job. Which made me suuuuuuuuuuuuuper awkward and slow at first, but I did feel as if I was surely but slowly getting the hang of it.