“@Pitcher17 I completely understand what you are saying. I throw a two seam and not a four seam, so I use the same grip, for both pitches but just really use the fingers and wrist so that I can pinpoint my slider. I never throw the slurve/slider in games it’s just for practices, does that change anything?”
Still curious whether you are High School or Pre-High School. My son had a thing for learning multiple pitches when he was younger. At around age 13 he was working with a retired major league pitcher. Seemed every week my son had a new pitch he wanted him to watch. The guy finally told him if it took using a second set of fingers for signs he had too many pitches, told him to stick to basics & command before he moved on to anything else. Based on what you’ve suggested you throw, everything is a variation of a fastball. I would advise you to focus on commanding your fastball and a change of speed. Without offspeed pitches it’ll be difficult to find sucess.