I'll be using Lyft for the first time when arriving at O'hare in a couple of days. My first question is do I need to schedule a pickup at the airport in advance, or can I just do it when I arrive there?

I've seen conflicting comments re tipping Lyft drivers. One comment says drivers can not accept tips in cash, and other comments say yes they can. I'd rather do it in cash directly to the driver versus having the tip added to the app billing. Any thoughts on this greatly appreciated.

Stew