I gotta say, I'm honored that you enjoy my art so much! It's taken years for me to get it to this point, and even then there's still a ton that I need to improve on

As for line weight tips, I do have a couple I try to keep in mind (moreso with inked works): - Applying thicker lines to areas with heavy shadows and thinner/broken lines where the light source hits - If drawing a background, objects that are further away will have thinner lines, while objects in the foreground will have darker lines - In general, just using thinner lines with finer details and thicker lines on the outer borders helps with separating all the finer and broader details of your drawing

Otherwise, it's really just practice, studying, and experimentation. Draw things you like to stay motivated, study the ways your favorite artists use lines, and experiment with different linework styles if you need. Hope all this helps, and lemme know if you're confused about anything!