Pasta salad help

I’m going to start this by saying I’m autistic and have chronic health problems, I really struggle with cooking and need it to be low effort.
With summer here I want to go back to eating salads, when I’ve done this before I just make enough for one portion then eat it but I’m not in a position where I can do that at the moment

So I need ideas on something I can make in one go that will last multiple days and a pasta salad sounds nice. How many days would it last when made (stored in individual portions in the fridge)

I think I would prefer more of a vinegary dressing rather than mayo, any recipe suggestions for a dressing?

And any things you really like putting in? Things to avoid that go bad quick?