easy questions first, you choose your referees, for couples its usually 6. If you have family issues thats fine, many people do, just be honest about it.
Visit the schools, ask what exprerience they have with looked after children, have they had attachment training, ask to speak to the SENCO, ask how they support children with extra needs. What is the ethos like? Are they nurturing?
Whilst academic learning is important, its not the be all and end all. Many adopted children have additional needs. My son did very little homework at primary school and the bare minimum for the first three years at secondary. School was school, home was home. Homework was not worth wrecking our relationship. Think very carefully about your expectations of your future child. Of course, many adopted children are capable of university and professional jobs, but many aren't. I never cared about SATs or whether he was in bottom set. I wanted to see him progress and achieve on his own terms. Find the right school and they will be the best they can be. He came out with a decent enough set of GCSEs and is off to college. I have s university education - it doesnt matter that he is at an FE college, its a huge success for him. Just be careful that you don't project your own aspirations on to your child.
With family traditions and holidays, again you need to be flexible in your thinking. My son loves holidays, we have had some great adventures, but he would start to get very stressed after 4 or 5 days and wanted home. He's a lot better now, but we return to the same places every year. Some adopted children find holidays very difficult. Same with Christmas, particularly with an older child who may have difficult memories around Christmas.
Taking adoption leave is important, the priority for the first year is to build trust and your relationship with your child, you can't expect to bring them home and put them into school and childcare within a couple of weeks. Until you have your adoption order you will have regular visits from SWs, you may have medical or school appointments. Your child may not cope with childcare.
As a single person I knew I would have to work, I went back initially 23 hours a week, working school hours. I was very lucky in that I had a 10 minute walk to work and school was opposite my office so I could run out at 2.55 and be in time to pick him up at 3. But I had spent a year building trust and our relationship - no childcare. no overnights without me, I turned up to every single assembly, school fair, sports day, I was there everyday to pick him up, we had all the school holidays together. It paid off big time. I'm currently working 30 hours a week and I have a very flexible employer.
You really should think in terms of one or both of you working part time. If its not needed, thats a bonus but be prepared for it.
You really won't know what's hit you when a child moves in. Its a massive change of lifestyle, its exhausting and stressful, don't underestimate the impact on you. I really wasn't fit for work at 6 months in. You need adoption leave