Simply put -- you've got to realize a couple things:

1- Linux is not Windows.

2- Use Linux like a brand new type of software you never heard about -- do not make any pre-assumptions.

3- Use Google to search for the most simple things, including "How do I install something on (Linux distro name you've chosen)"?

4- Have some patience -- you won't learn (everything) on day one. There will be mistakes, there will be problems you will not solve em today. But you will solve em tomorrow.

And here's a little "cheat sheet" of mine on how to use (and get used with) linux:

1- Get used how to use the package manager. (Where you will search and install stuff.)

2- Learn what are your audio and graphic packages (The "drivers") are. (See 3- above.)

3- Learn how to run the stuff you installed.

4- Learn how you configure the distro to your liking.

Learn all these four steps, and you can consider yourself a linux "pro" user.