I would say that it's quite difficult to give just general advice. The possibilities that this simulator offers are nearly limitless.
The better understanding you have of real life roller coasters and attractions, the better time you'll have with the software. Understanding the basics of roller coaster design such as what block zones are and why you would use them, the differences between drive tires, linear induction motors (LSMs), and chain lifts, how different types of brakes work, and much more that would make this list very long, are some of the foundational concepts that would be good to have starting out. This forum is pretty well catered to those enthusiasts already with this knowledge, so a lot of information here assumes this. We've got lots of enthusiasts and some industry professionals, so there's is a wealth of knowledge to pour through and receive. Try not to drink from the fire hydrant. ;)
The Mega Resources Thread linked for you is a great read and has lots of tools you probably won't use for a long time, but you should familiarize yourself with what is available so that you know where to reach out when you need something.
Welcome to the community.
Good luck with your designs!
