RE: How to get on plane on Ftype and what is the correct stance - need help.
Planing early on a short, wide, board is a very technical skill. Also, you probably don't have enough wind most of the time- with a 7.5 you will need at least 4 Bft to get planing, so don't even bother trying in 3 Bft.
Assuming you have 4-5 Bft, here are some tips to get planing:
1. Put the footstraps in the inner positions so they are easier to get into while you're learning.
2. Have a good windsurfer who is about your weight and height try out your gear so they can put the boom, harness lines, and mast base in the right places. Watch the way they sail and imitate it.
3. Try to keep the board level on the water. That means in light winds you will need your front foot near the mast base and your back foot in the middle of the board between the front footstraps. Only when the wind is strong enough for you to put your weight on the sail can you safely move your feet backwards without sinking the tail and tipping the board to the side.
4. When you move your weight back on the board, keep your back foot close to the centerline to keep the board level. Put your front foot in the footstrap first, then turn downwind to accelerate and put your back foot in after you start planing. With your weight supported by the sail, your feet can push the board forwards and sideways without weighing it down.
5. You might be able to get in the harness before both feet are in the footstraps. If so, that will help you transfer your weight into the sail, although it will increase the risk of crashing before you get your feet in the straps.
PS- You should have gotten a longboard. On a longboard it's easier to get in the harness without being planing and in the footstraps. You can learn more gradually, and still sail enjoyably in 2-3 Bft with a 7.5 sail.