I was told one story, I don’t know if it’s true. One shooter had a bad habit practicing with live rounds at home. First shot was at TV, second at the wall and third shot at the wall resulted a divorce… So, always practice with dummy rounds, it is better to put all live rounds in a safe or in another room, so you have no chance mixing live and dummy rounds.
Dry fire trainings are 70% of success of competition shotgun shooters. Yes, that is true, you can train at home at no cost and have much better match results. I usually train every day for 15 minutes, that is enough to improve your skills.
Practice reloading shotgun, practice shouldering, tactical and emergency reloads.