First time getting on birth control

I’m 18 never been on birth control sexually active on a regular basis with just my boyfriend I have heavy flow periods and very very bad cramps I want to get on birth control to normalize my period and I’m not planing on a baby anytime soon I don’t want a device or an insert, I want a pill I have insurance from work but I want a cheap prescription but a good one. I don’t want tons of side affects and I know it affects everyone different but I know some symptoms are similar for some people. Suggestions?? Any help I’d appreciate 😊