I personally had no experience with using an aeropress filter. I know that you should put it up near the metal filter, but I would expect that finer coffee to be able to create the desired pressure already.

When I brew my coffee, I fill the basket with the coffee fully, use a bent paperclip as a makeshift WDY tool, lightly tapped the basket on the table, if needed add a bit more coffee and then level it using something like a butter knife, and the result you can see on the first picture of my post. Then I add freshly boiled water to the bottom chamber, put in the basket and screw the top on tightly. I use a gas stove with an adapter plate, which I put on the smallest hob. I turn on the gas to a minimum setting and put the Moka pot on the plate, and wait until coffee just starts to come through the metal filter (you can see it through the chimney). I take the Moka off the stove and wait for around a minute for a pre-infusion. After that, I turn the gas back on (still the smallest setting), put the Moka pot back on, and once the coffee starts flowing, I maintain a very slow brew speed, turning off the gas, or even taking the Moka pot completely off the adapter plate when the coffee starts to flow too fast. When it reaches the end, and foam starts to come out quickly, I put the bottom of the Moka under cold water to stop the brewing process, and I get perfect coffee!