With your action, go back to whatever feels natural. Don't think about what your doing too much just bowl, you'll need to practice it for a while to get it consistent.
For your run up, I'd experiment to find something that works for you. You want to be comfortable and balanced when you reach the crease so try different lengths of run up until you find the one that suits you.
Ideally, you have to find these things for yourself, other people can advise on how to find it or fine tune what you have but you should try and work your own basic action and run up out for yourself as this will help you throughout your cricket career. Good Luck and have patience with the process!