Vesc tool setting

Hello,

I have a Flipsky 6384 motor 140kv with a 12s5p battery and esc spintend ubox all lite 100A 100V
I tried with a 106 liters board and a gong foil with a front fluid 1500
I would like to set the system to have a foil assist
this morning I tried to foil in flat water but I think I hadn’t enough power to takeoff
what I have to check and set in vest tool?
I don’t know what the previous owner set
thanks