Please recommend to me a night time serum for non retinol days

[elephantjuicey]

I'm finally trying to instigate a skin care routine.

I'm 39 with pretty good skin. I'd say it was normal, but sometimes a bit dry and can be a bit sensitive. I have some fine lines, and it can be a bit dull. I don't often get spots.

I use a weak retinol a couple of times a week but would like a nice serum for the other nights. Bonus points if it feels/smells like a spa treatment!

A hylararonic acid serum maybe. There are posh ones like Medik8 but also the one The Ordinary so is pretty good.