Dry fireing is good.
Most new shooters want to get into the combat games before they master basic marksmanship. Practice the basics
Sight alignment, trigger control, breathing, muscle tension, feet position, body position.
speer used to make a practice round. It shot a plastic bullet, had a plastic case which you placed a standard primer in. It was loaded without tools. The report was about the level of a cap gun.
When I used them I shot into a cardboard box. We also used them on wandering cats. Stung them but left no lasting damage.
Good luck and remember HAVE FUN.