On this size of account I’d stick to forex and only open 0.01 lots size positions.
The easiest way is gonna be to just open a demo account with 10k balance and the same 30 leverage. Then open enough 0.2 lot size position manually until you hit about a 1/3 of your margin.
Since 10k/0.2 lot is the same as 0.5k/0.01 lot that will be the number of EAs you should trade on your 500 dollar account.
This should take 5 minutes to open a new account and 5 minutes to do you calc :-)