You've got quite a great setup! I personally recommend Stock Visual Enhancements and Stock Visual Terrain, they are great visual mods that makes the game beautiful! For parts I love Bluedog Design Bureau, Tantares and HabTech, they match the stock games's art style and will add 350+ parts with all three!
Here's a screenshot of what SVE and SVT looks like:
For installing mods CKAN can help a lot, it is a mod installer, but it can install mods incorrectly sometimes.
I do think you'll love the game a lot more on PC, and have fun!