[IanW]

I would start with the some of the in-program tutorials. You definitely don't need all of them, but the basic part modeling and assembly creation is a good start. It's really important to know how to use these from the start.

After going through these tutorials, just start modeling stuff - drivetrains, manipulators you might use, whatever. I've found the best way to get good at 3D modeling is to just do. One aspect of modeling at this level that most users (new AND somewhat experienced) don't catch on to is the importance of using design intent, or making sketches and features behave how you want them even if you change the dimensions. If a line needs to be perpendicular to another, add a perpendicular sketch relation. If two circles need to be horizontal to each other, add a horizontal sketch relation. If these terms don't make sense to you, don't worry, you'll catch on as you learn.

Once you've become intimately familiar with the basics, branch out as you see fit. Want to test your parts before you build them? Try learning the simulation/FEA tools (these are actually pretty tricky, resilience is key). Does your team want to use sheet metal? Learn how to use that subset of tools. Really, it's up to you.

Hope this was helpful, and good luck on learning SolidWorks. It's really an invaluable skill-set to have. If you ever run into problems or want to learn some new feature, look for tutorials/tips online first. Chief Delphi, as I'm sure you've heard (or will hear) time and time again is an excellent resource too.

Good Luck!