Jlc’s preferred (?) circuit making program is EastEDA.com and it has pretty tight integration to parts on lcsc.com. You can of course use any circuit program like kicad. Jlc will assemble boards inexpensively for you if you select the right components (which easyeda will show you if a component can be picked from jlc). I transitioned away from through hole parts to surface mount parts with these tools. pretty awesome that they offer this service for a home hobbyist. They now offer double sided assembly, too.

Or, you can order the components from lcsc and they’ll give you a shipping discount. It’s pretty affordable overall, although prices have increased in the past year.