As mentioned, the BA is quite a first century to attempt. Though not acentury, maybe the Alpine Challenge would be better for a first challengingride.
Almost all of the climbing of the BA is within the first 73 miles - more than 11,000' within the first 73 miles.
My first attempt at the BA was a week after the Alpine Challenge (6,500' over 73 miles), and I completed 3 of the 4 passes of the BA - about 7,800' of climbing.
I came back a few years later and completed the whole thing. I was not among the top 10, but I did stay at a Holiday Inn Express once a few years ago.
The second pass I find to bethe most challenging - 6.7% for nearly 5 miles. If you've got anything like that for training, you should work it fully in your legs over the next few months.
Man, try to make time to do that 2 hour ride with 3000ft twice in a day…a few times.
Why is your leg fine on Saturday?