DD started FDC at 6 months.
I let the daycare mum know what her general routine was at home and she tried to keep it as similar as possible. I also let her know what DD likes/dislikes
I expressed milk for her to take and as DD weaned we gradually changed over. When she started solids I just sent a few different things in small amounts. I wasn't too concerned if she didn't eat much as I knew she was also getting the milk and stuff at home. I would BF her before we left home (daycare is only a 5min drive from home) and then another BF when I got home. I also expressed milk during the day.
When she first went, i put her favourite bedtime toy in the bag which she was only allowed to have a bedtime so the other kids didn't play with it.
I would try and get there 10 - 15min earlier so I could spend some time with her just while she settled and according to her daycare mum she was fine.
I always make sure I let her daycare mum know what is happening at home so if anything happens its not out of the blue eg. teething, has she had a good/bad night etc
HTH xx