Hello and welcome. Please don't hate me for the following advice, but I think it is really important to consider (even though your past experiences may seem to contradict the statements that follow):
NO CUDDLES for any parrot. If they give them willingly, it is highly sexual and leads to behaviors down the road. Do not ever pet a bird anywhere other than the head and neck (even if they like it and even if they want it). It is making a promise you can't keep, and it contributes to major problems and re-homing of birds on a world-wide scale. If you want cuddles, consider a different pet, please. If you cuddle a baby, you set a standard that is extremely detrimental once they hit puberty, so you need to be consistent and set behavioral expectations from a young age (even before they start getting hormonal).
Also-- not huts, shadowy spaces, tents etc...these areas simulate nesting environments and they may not create issues in a baby, but they will in a sexually mature bird...and since birds hate change, it is best not to start something you cannot sustain.
On top of that, do not dismiss the risks of combining multiple birds...They could have a very contentious relationship and that is NOT as easy to deal with as it sounds (you need to remember, you may not be able to allow them out at the same time). If you spend 4 hours of time with your 2 birds(out of the cage) then imagine 8 to 12 hours for 3 birds, in the event that they try to fight or mate (even though they aren't the same species)....you don't want to let them get aggressive or hormonal. Plus- the introduction of a 3rd bird could upset the relationship with the pair you have and create a situation where they all have to be separated (it's possible-- even if it sounds negative---think about kids trying to play in groups of 3...it rarely goes well- then amplify that/ restart the clock when your new bird hits puberty, because, again, dynamics will change --even though the bird is a different species).
Also- remember that you will need to quarantine a new bird for at least 30 days in a separate room and accompany that period with an extensive vet visit (including testing--not just physical). They can be asymptomatic carriers of deadly illness for a lifetime without ever manifesting symptoms. You will also need to run tests on your current birds, as they could pose a threat to a new bird.