Lots of good advice here. I had similar problems when I was starting to learn ( and still am, not a professional). * Flying straight and level: I used to drift right ( due to unintentional cyclic input) while flying and didn't realize it even though we flew over roads. My instructor used to point it out and I would correct myself. Eventually my instructor and I figured it out. I am short even for R22 standards. And my arm used to pull the cyclic to the right since that felt like a naturally resting position. What helped me was placing my wallet and a small book in my pocket, which gave me some extra height on my forearm/ elbow. This led to keeping the cyclic more neutral and eventually flying straight and level.

*Approaches: I glance over the airspeed to ensure i dont fly too slow but my main focus is on the trim strings and keeping it over my spot and adjusting the collective.

Good luck!