What level of training do you need? SSRS Administration or SSRS Development?
I took the official MS course 6235 (I think) for SSRS, its a mixture of both, but focuses mainly on the administration side of it. For a complete novice it is alright.
Our training provider at the time was QA.com
Edit, course is 3236, not 3265 like originially said.
QA also have course QASQLRB08 which seems more development focused.