You enter where your home address is in the first, if your location in the world is different you click no and enter the address in the country that you currently are. You then upload proof you are where you declare you are.
You can’t do it . For your first year you will have to have 400k baht minimum in your account 2 months before the application date. For subsequent years you MUST have a minimum of 40k baht transferred into your account for 12 consecutive months before you apply and continue infinitum