Cant do push ups or pull ups?

Start off doing wall pushes every morning and every evening. Stand about 3 feet from the wall and do as many push up type moves toward and away from the wall with your back straight. Also, do explosion pushes where you push hard enough to move your hands off the wall. After a week, move further away from the wall. Continue doing this until you are so far away from the wall that it is uncomfortable for your wrist. Then move to placing your hands on something lower such as a chair or couch. Also, move to the floor and only work on doing the down portion of the push up as slow as possible. As for pull ups, get you some resistance bands or some elastic tie down straps, sit on the floor with the straps attached to a door or something overhead. Work on the pulling down the straps as if you are doing a pull up. Also, on a regular pull up bar, do jumping pull ups where you hold the bar and leap as you pull yourself over the bar. And don't forget to work on standing on something so that you are above the bar and lowering yourself as slowly as possible.