I'm having trouble with my picking speed. I've been practicing alternate picking a continuous note, starting slow with 8th notes and then building up slowly to 16ths but I struggle to keep a steady rhythm of equal up and down strokes, the pick sometimes catches on the string or sometimes I even miss the string. I know practice makes perfect but I've been having trouble with this for a while now and I'm starting to think there is something I'm doing wrong or maybe it has something to do with my string tension, gauge or type of plectrum. My strings are a little bit loose at the moment because I'm playing in d-standard on a medium-light set of strings and I use a big triangle 0.73mm pick. If anyone has any advice it would be appreciated.