Hey & welcome to GT! Glad you are enjoying it.

Originally Posted by: kelvintsang

Technique-wise, my initial comment is the lessons are not thorough enough. Say I'm learning sweep picking, and I found myself searching youtube for additional practices. I hope Guitartricks can provide more high quality practice materials.

I'm not sure where you are looking or what lessons you are working through. But is you use the search function you can find a lot of lessons on just about any topic.

https://www.guitartricks.com/search.php?query=sweeping+sweep%2Bpicking

Also, I've got a whole series of tutorials on learning sweep picking from beginner through intermediate to advanced.

https://www.guitartricks.com/instructor.php?input=155014#Sweep_Picking

Hope that helps! If there's anything you can't find, then please ask! Have fun!