Hi Jonathan,
When I started mixing I was using Serato but despite it’s complications I still felt it was easier to get into than Traktor. However, the biggest step forward I made after just messing around with the software, trawling youtube for tutorials etc was, the DDJT tips course, How To Digital DJ Fast. I went from clueless to recording my own mixes in a matter of weeks. I know it’s more expense after you’ve got all of your gear but in my mind it’s money well spent. I still refer back to it every now and then when I run into a problem with a mix etc.
Good luck with your mixing!
Mark