I’ve got the love Luna ones from Sainsbury’s - as a first try. They’re pretty good. I wear them alone and I’d say I have a heavy flow day 1, but a bit more regular day 2 and 3 and they cope with those days no problem. Not sure I’d risk it day one!
You just wash as normal in with other stuff - they dry very quickly.
I would say if you want them for overnight then go for ones where the absorbent part goes right to the front or back. These ones are just a gusset part. For the money they are good but I will be buying some others and intend to buy them for DD when needed.