hello! one trick I used to do was use the linework layer option; the lines will be effortlessly clean and you can adjust the pressure on the curves of the line to make them thinner if you wish. I did all my lines by hand with a brush that showed every little mistake which might have been my problem. in the end, it's really a matter of preference; some might enjoy the process, some don't. keep exploring different brush settings until you find one that makes you happy both art-wise and personal!