yeah it can be a bit tricky SSRS in some places. luckily I had the joy of the 3 day SSRS admin course along with working along side a ex MS Trainer in a previous role who specialised in all things SQL so I picked a lot up from them.

Also I would recommend these two books if you want to go deeper into SSRS

http://www.amazon.co.uk/Microsoft-Server-Reporting-Services-Package/dp/0735626472/ref=sr_1_1?ie=UTF8&qid=1331627957&sr=8-1

http://www.amazon.co.uk/Microsoft-Server-Reporting-Services-Unleashed/dp/0672330261/ref=sr_1_9?ie=UTF8&qid=1331627957&sr=8-9

Happy I could point you in the right direction