Your second bird is likely to bond less tightly with you. Not guaranteed, but likely.
If he is around another bird, he will be more interested in the bird than in humans; that's just nature.
If you are able to use the quarantine month to bond with him really well, then you have a good chance of keeping a bond with him even after you start introducing him to your first bird.
But I would strongly recommend that both you and your husband continue to spend a good chunk of one-on-one (or two humans & one bird) time with each bird, in a separate room, so that they both remain friends with both of you.
Properly socializing a new bird takes time and effort. You can't rush it.
Obviously I'm not saying don't do it; just be prepared to put in plenty of time with EACH bird EVERY day for a minimum of 2 or 3 months.