In order to submit an account application with IBKR you have to meet certain minimum age, liquid net worth, investment objective, product knowledge and prior experience qualifications in at least one investment product and you are required to select at least one country to trade in.
Details as to the specific requirements for each of these criteria is available on the Trading Requirements section of the IBKR website.
Please note, once the account application is approved, you will be able to manage your trading permissions in Client Portal.