I would normally agree with Don about the picnic date being too much pressure for a first date, but given Covid, it's probably the safest setting for a date right now.
As for the "text me to let me know when you get home" stuff - it IS chivalrous if it's an evening date, especially if alcohol was involved. The truth is, it's a dangerous world out there for women. On the other hand, the feminist in me kinda wants to shout "How do you think I get home all the OTHER nights?" lol. No, really, guys, it's a thoughtful touch even if it's at night, a bit unnecessary like opening a door or pulling out a chair, but generally appreciated and taken as a sign of good manners.