Yes, you can get 3 FPP per day in advance, and once you use all 3, you can add additional ones (if available) at a kiosk in the park.
You'll have to "publish" the plans for others to be able to see them and comment.
Based on your FPP choices, I'm guessing that you have a young DD... Except for BTMRR and 7DMT, I have never personally tried for any of these FPPs. Also, I don't know how crowded your days will be. The only 2 that will be "challenging" are A&E, and to a slight lesser extent, 7DMT. For those, you need to be on-line RIGHT AT midnight on you 60 day mark. The further into your trip, the better the chances of getting "difficult" FPPs. If you don't get them at 60 days, keep trying - right up until the day before; Disney holds some back and gradually releases them as the dates get closer.
Don't know if you are planning on Splash or SM, but even on low crowd days, those lines can get pretty long; you may want to consider them for FPPs. The one time I did Belle, it was during EMH and it was a walk-on (in fact I had to wait for enough people to show up for them to do it); not sure what lines are like at other times of the day, but this might not be the best use of an FPP (if you want to do Splash or SM). Also not sure how "needed" FPPs are for Cin/Rap M&G; the times I've walked past I've typically seen 20-30 minute posted waits. Maybe others can comment on these.