We fostered then adopted, and also have one biological child as well. Were at the point where things are starting to work out and we are considering fostering again in the next year or so.
It may help to attend adoption support meetings if they are held locally, we found them in the main not for us, but we did meet other adopters who were getting a lot of benefit out of the meetings.
Keep in touch with your SW if they are any good as they can be a great help in the early days if needed.
Letterbox contact may soon loose it’s appeal depending on the parents, we had one follow up then silence which suited us, but knowing there back ground it wasn’t a surprise.
Life book is good a do keep it updated kids love to look and reflect as they get older.
Also we have never kept the adoption a secret form the kids and they can ask questions anytime they like and we will answer them to the best of our ability. But it depends on age we fostered at 1yr and adopted when 4 years of age.