Probably the best idea is to check back here approximately 8 or 9 days before departure. Your flight is quite a long way away, and business travellers with status, who are the people competing for seats here, simply would not have booked anything at this stage, or may cancel. So we can look at the numbers and existing reservations but at this point it is too difficult to say.
FLY will keep you together, we very rarely get complaints of even large families getting split up, but whether you would get a window seat is very much open to question. If getting a window seat is pretty important, then you need to consider whether you want to pay or whether you can get Bronze status quickly.
On that service, due to the sun, the starboard side is better. But there is a big bias to the port side when it comes to seat selection. Bit daft, there is more footfall on port, but that's another matter.