Hi Jennette ,
I had given F5 and F6 together and passed them first attempt.
F6 has got a lot of content to cover which ample of your study time would be needed to practise. F5 for me needed less time but was equally important.
But an important point to note here is that its better to decide now what you intend to do for the 2 compulsory papers. Its always better to do the advanced level after the fundamental as there alot of brought forward knowledge in the advanced level papers.
For example , if you intend to take ATX and AFM , its better to do f6 and f9 before that. So do your research what you intend to do for the advanced level papers and leave a reply .
I'd be happy to help
Sanal