feedback on filminig!
Try using a monopod or a tripod.
Autofocus will never work for this so what you need is to close down your aperture to have a deeper depth of field and be able to focus better manually. Depending on you camera you migh be able to use focus peaking. Also using lenses designed for cinema will give you a much more precise focus. If you use a focus puller that will use his designated screen then things will get even better