Your SolidWorks license may or may not include SolidCAM which would allow you to skip the STL — it’s supposed to be the same CAM tool as is bundled w/ some other commercial products, so other tutorials may apply.
Just to set expectations, I don’t think there’s a straightforward “SolidWorks for Nomad Dummies” that you could use. I think the overlap between SolidWorks users and Nomad users is quite small, as Nomad is a hobby machine and Fusion 360 heavily dominates among hobbyists due to the free option.
Aside from that, you’ll have to set up the machine in SolidWorks (which should mostly be a matter of looking up specs) and find some comfortable feeds and speeds. If you’re working with metals, the Nomad (at least the 883 Pro, it wasn’t clear which Nomad you have) can be quite picky about those because of its puny frame and spindle (relative to the machines your pros are working on), so I’d recommend looking at Winston’s fantastic MaterialMondays videos to get an idea of what feeds and speeds to use.
All that said, you can also just use another program for CAM, like MeshCAM or even Fusion 360. You’ll have more resources available that way.
What version of Solidworks are you running? I have 2018 and found the CAM side a little clunky, Meshcam is likely a good option starting out but I’m not sure what filetypes it can import. I’ll have a bit of a play and see if I can help out at all (I have a shapeoko but it will be similar workflow).
Maybe best is to start with some pocket cuts and get the process sorted, then progress into complex models.
I’ve just started playing with it but it’s actually really cool. In particular, it can auto-detect features for you and set up the toolpaths semi-automatically. Plus, tolerance-based machining looks interesting.
@Moded1952, SolidWorks is yet to fail me… From the video tutorials I’ve reviewed it looks to be pretty crafty. Just need to get HSMXpress to work and, well, receive my CNC (it’s on backorder right now). Soon!
FWIW, though it might be great for larger machines, I haven’t had any luck with the calculators on the Nomad, at least milling metals. The machine has great difficulty performing anywhere near its rated specs, which seems to confuse the calculators.
I’ve heard of some people around the forums using HSMAdvisor though, maybe they have better luck than me.