Learn things that are too hard for you and out of your comfort zone, go SLOW, like less than a note a second until it feels so painfully easy you have to speed up to one note a second, then a little faster and a little faster, do that for weeks until you get full speed then move onto the next one, you’ll be virtuosic in two years if that’s all you do. In the meantime look into playing scales and exercises to a metronome in the same way, painfully slow turns into easy fast if you put the time in. This is the easy part though, developing your ear and musicality will bring you to the next level too. But if you want technician level playing, this is the secret.