I am in a slightly similar situation to which you are. I have not studied for like 6 years properly. I have exemptions from degree level.
I work for an accountancy firm. SBR is the first exam I intend to sit very soon. I have some knowledge of accounts from degree level & from work.
But my question really is would it be a good idea to re-learn/learn F7 first and then proceed to learn SBR. Or does the SBR study kit cover everything.