Hi @hermionelodge I think lots of of us have gone through that and are coming out the other side.
Re the crying and clinginess-that does calm down very quickly. She is new and scared. The flitting method works well here, where you basically flit from room to room, job to job etc. So sit down for five mins, go over to the sink for five mins, walk to the fridge, back to the chair, back to the sink etc just keeping moving around a lot and they soon get bored of following you. Don’t give in to the crying, don’t cuddle and reassure them, just ignore and stay calm. Ignoring them a lot is good! They soon learn your routine and that you’re just making dinner or loading the washing machine and it’s boring. Mine tends to keep an eye on where I am now but doesn’t follow me much anymore. If you’re going out of the room for a bit longer eg to have a shower then leave a lickimat or their nibble in a slow feeder of some sort.
Mine was crying a lot in the mornings so I would go and have a shower, come down and get the lunchboxes out, go back upstairs and maybe get dressed, come back down and make the sandwiches, go back up and dry my hair, come and down and do drinks and snacks and so on. Was a bit annoying but I actually only had to do that for a few days. Ignored him every time I went in and out of the room and they soon learn not to worry, that you’ll come back.
Nighttime’s I think you need to keep a firm but fair approach. Have him by your bed if you’re happy with that. Then maybe in a couple of nights move him away a little bit, and gradually move the crate to the door, the landing etc over a few nights. If she a whimpering just hold your hand near the crate and shush her but I think don’t response every time, a bit of ignoring is good too.
Good luck. We are two months in now and he is lovely although smelly and very restrictive!!