OK, OK, I'll offer my bit LOLOL...
The advice given about removing the foot off the back strap is valid, very valid... so take notice and practice that.
Here's my bit, this is how I help/teach my mates.. and they are all foiling - the secret to controlling a foilboard is to NOT FOIL !!!
Full beginners..
1 - get up on top the board - no leaning, FLAT
2 - keep it flat ON THE WATER..
3 - take all the power off your kite keeping just enough to stay afloat and move forward, any direction will do.
4 - revisit point number 2 - keep your board on the water. If it starts to lift, immediately de-power/sheet out your kite and smack the nose down back to the surface.
5 - get to the end of your run, stop. Turn the board in the opposite direction and ride back.
6 - do this for an afternoon, 10-15 runs at least.
This is multi purpose design:
a) it will teach you to control the porpoising/bucking bronco manner of your foil by putting the weight forward so your nose drops
b) it will teach you to de-power your ride - keep your kite 11-1.
Do a few runs like this "I must not let it lift".. then, you will notice your (foiling) kite control will get to a stage that if the board starts to lift you will know how to combine front foot pressure with de-power in a manner that you'll find yourself having a few little runs off the water. You know that as soon as it get out of control you can kick it down again.
By the day's end you should be able to ride a few meters. If not, persevere. You will find what works for you..
Does it always work? Well Yes, as long as you have patience to put in the time and learn the NEW methods of control of a NEW sport. The biggest mistake we make, and I was guilty of it too, it to go into it applying what we already know and then get frustrated because it doesn't work. Think of it like a new language: Screaming won't make you better understood to a foreigner, you must learn the new (language) rules

I have new foil mates in my area - they listened, they are riders now. It's your choice to 'listen' to a new sport or shout at it.
Happy ridding guys.
Peace up and sweet Seabreezes to us all