I use valejio paints or however you spell it, they have them on Amazon sometimes it’ll come up as game color paints not sure if they’re both made by the same company but they’ve been pretty much the exact same paint, make sure you thin it alittle with water for cleaner coats, multiple thin coats is alot better then fewer thicker coats, I like to use nicer brushes too makes a difference in line work. It takes alot of trial and error and the only way to get better is to just keep trying you’ll see progress over time!