If you are not in mountain shape, you are not prepared. You can run marathons but if you legs are not used to going up, and more specifically, going down, you are going to have a miserable day.
If you are a noob, there is a lot to learn. Gelsomina seems to be learning something every time sHe is out in the mountains. The more you know, the better you can plan your trip, the better chance you can be successful. You don't want to be learning what works and doesn't work at 14,000' after a cold front passed and it 20* F and the wind is howling at a constant 30.
She is not a noob. According to her posts, she does a lot of hiking and trail running, she had a 12-mile mountain hike on June 2 and
1513-mile mountain hike on June 16. I would say that she is in mountain shape. (She's certainly in a better mountain shape than I was when I day-hiked Whitney this week.) Additional hikes on the list are just more of the same. The main thing she still needs to learn is the effects of altitude (none of her trips took her higher than 11500'), and this is not going to change because the remaining hikes on the list won't take her higher than 11500' either.
Gelsomina:
Re-reading the thread, I see that I've missed the part about you doing this with 2 other guys. Then you obviously can't move up the schedule and head to Whitney at the first opportunity as I suggested. But I still think that you should get either Langley or White somewhere into the schedule.