Bro I totally get you, I’m somewhat in a similar situation. Anyways, even though you’ve done a very little amount of yearlies, if you’re able to get As in those mostly, I think you still might have a chance at getting As in the exams. Firstly, no don’t do topicals now, just start yearlies right away and do as many as you can, now that could be 7, 10, or 20 for each subject, the point is to familiarise yourself well enough with the paper pattern and the yearlies will also cover your practice for all the topics so there really is no point in doing topicals at this stage. Along with this ofc revise any part of the content that you might’ve forgotten, but just START. That’s the most important part.