Nice to see you are looking into expanding your playing, you are right, there are a lot of options out there, some are free and some are at a fair price... I personally like the stuff you can find at Jamtrackcentral, they are suited for all levels and all styles, very oriented to make use of the stuff rather than boring exercises... Also Troy Grady have a very interesting scientific approach to guitar technique that could be useful, he got a lot of free sample stuff on youtube, check it out!