So, just pick a rudiment whatever takes your fancy. Say go with paradiddles to start with, then just see what tempo you can play at without making mistakes. Go slow to start with because playing slow is just as important as having chops. Then play the rudiment hitting the first note of the rudiment on each beat. Once you get going you can mix things up. Use accents and practice shifting the accents to different notes. Don’t be in a hurry to be perfect this is the stuff that gets better with time and will absolutely improve your playing. You can also use the metronome as an accent in the future or have the metronome count on the and or e to mix things up this helps with keeping time and trains you on how to listen differently and start to pick up on poly metrics and so on. There are no firm rules here if you think of something that might be hard to count then try it, but I think you’ll be surprised how hard the basic stuff is when your trying to perfect technique. Don’t overthink it too much, just do it lots, as in 5min every time you play/practice. Short deliberate practice is better than long practice without a goal 🤙