I know about the obvious stuff like a bright vest, blinking rear light and wearing light colored clothes but is there anything else that I need for when nightfall hits?
A slightly less ugly alternative to amber reflectors between the spokes are reflective clips that wrap around each spoke:
https://www.salzmannltd.com/products/salzmann-3m-spoke-reflectors
Iβm also pretty sure that lights in the EU are required to also function as a reflector or that at least most modern ones do.