Welcome. There's a bit of a learning curve, but the forums are great for questions and once you get a few things down, I think you'll like it better than your iDevice. At least I do. 
Your Razr will download updates over the air (OTA) so you don't need to connect it to your pc for software updates for either your phone or the apps you have on it.
MotoCast will enable you to sync to your pc's music and more! You install the software on your pc, the app on your phone, and your phone can then stream your music from anywhere plus access folders you designate. For example, I have my music, document and picture folders all accessible from my Razr. So if you desire to do that, follow the MotoCast link for more information or this FAQ.
The two biggest things I had to keep remembering when I switched from an iDevice to my Razr is 1) use the Menu key if you feel like you should see more options and 2) use the Back key to go back. Since my iDevice didn't have keys for that, I kept forgetting about them!
If you're still finding your way around the Razr, this Razr Simulator is a nice way to get familiarized with some of the basics. You've already found this forum, so feel free to start other threads with questions or problems.
Enjoy!