Originally Posted by: MalvocTheres so many videos on this site, that I really don't know where to start...[/quote]
Since you've already paid for it with a subscription, I'd encourage you to get the most for your money and go through GF1 for a quick review.

http://www.guitartricks.com/course.php?input=1

Sure, you might already know how to do everything in there, but it will give the necessary foundation to understand everything that follows. And you might pick up a tip or two that will help improve your understanding or technique!

It probably won't take you long to go through it. :)
[QUOTE=Malvoc]I have a hard time understanding basic scales ...

As Ben said, go through GF2!

http://www.guitartricks.com/course.php?input=2

It starts with intervals and then builds on it with scales, chords and how they are all related. How you use them when you play anything on the guitar!

After that, I'd pick a course. Sounds like you'd be interested in rock and blues. Once you get into courses you will start to have more advanced questions. The instructors will mention other things to learn and expand upon. You can search for those things in the GT search tool.

And once you know something specific you want to work on you can always ask the instructors how to do it!

Let us know how it goes. Have fun!