Those birds look just fine. let me offer you my thoughts.
The coop is quite small,, I know its a starter,, but it is still small. Housing for pigeons is usually referred to as LOFT. Some of the other ones in sellers pictures are larger, and more suitable. If you want to have coop to house quail,, I see it as fine,, as long as you don't overcrowd with too many in number. I do not have a guide to housing quail, so use your best judgement on number you desire to raise/keep
That coop,, can also be used as a starter pigeon loft,, and then Added on to. Would need a pigeon trap added if you intended to free fly your pigeons. I made a Sputnik style trap for my pigeons. A trap made with bob wires works well also.
I would choose to add a sizeable aviary at first,, then play it by what you learn as the pigeon population increased in numbers.
Second thing to remember,,, You will need to keep those pigeons from seller as PRISONERS. Let me explain,,, since you dont treat them BAD IN ANY WAY. . You just cant free fly them,,,,,,,, possibly forever. Homers will return to their original loft. (there are exceptions, and that gets into another completely different discussion)
With that being said,, all the newborn pigeons in your loft will return to your loft.. It is their home. Providing,, that they were homeset.
WISHING YOU BEST WITH YOUR DECISION ,,,,and