You don't have to do anything! As soon as we receive your funds, they will be automatically invested (placed in a pool, usually invested within a few hours) and generate interest.
Your balance is calculated on the last day of each month (and not on a run-of-river basis) and expressed in EUR or USD. You can add funds at any time (which are then automatically invested) and withdraw all or part of your funds each month. Your earnings are accumulated and automatically and permanently reinvested (without any action required from you).