menstrual cup at school

i’ve been thinking about getting a menstrual cup because of my very heavy periods. pads are literally disgusting,and tampons aren’t an option because they don’t hold long enough. please explain a little in the comments about anything you know about them. also if i’m at school,how would i change it ? one, it’s a public bathroom and two, i have literally 3 minutes between each class. and would being active affect it ? i’m in tech so i have to walk a lot in a day and move around laminators so would that make it leak or me have to change it more often ?