Excluding playing more, is there anything else to help complete higher star maps?

Preface this, I play just for fun. I know I'm never getting to 7+ stars and at my age I don't think I have the reaction time anyway. My goal is to be able consistently achieve C Rank in high 5, low 6 star maps. I do try and achieve the best accuracy but honestly it's not the biggest thing, I just enjoy how the game plays and the way beat maps flow together. I don't care too much to get on the leaderboard or have high PP. Playing this way is relaxing for me and I'd like to keep it that way. I understand the best way to improve is playing more and I am trying, but is there anything else to enhance the time when I am playing that will help me achieve my goal?