You're getting there, SB. Just keep practicing.
A comfortable position goes a long way toward making pretty welds, especially in the beginner stages. Find a position that gives you good arm support for the hand holding the stinger; a place where wrist action is easy and no strain needed to keep everything you mentioned, speed, arc length and consistant feed. Once you master those basics, and you will, you'll find you can weld in any position, even upside down.
Master that MIG machine then we'll get you going on TIG. You'll love that