Welcome to Fortuna, console Tenno! Just a heads up that the active K-Drive races (green circles) are for PC only. Apologies! However, K-drive locations should all be the same so you can use this map to check for active locations easily.
Complete Fortuna Guide
After considerable work, I put together the "ultimate" Fortuna guide that covers (almost) all activities that you can do in Fortuna and on the Orb Vallis. Take a look and see what you think - perhaps using