Welcome to the forum! I'm surprised you didn't get the R1T just to check it out and get comfortable with EVs. That thing will retain its resale value until the Silverado arrives!
If you're really concerned about charging outdoors ta your home ... you can look into a "ruggedized" setup that is more meant for fleet/parking-lots than it is for a residential application.
HCS-60R, Ruggedized 48 Amp EVSE | ClipperCreek
The HCS-60R is an affordable solution designed for fleet, parking lot and extreme weather conditions.

Ruggedized ProMountDuo (PMD-10R) Universal Pedestal
The Ruggedized ProMountDuo (PMD-10R) Universal Pedestal is the perfect solution for installing your ClipperCreek or Tesla EVSE.

Edit: No, I don't work for CC or Enphase, I just know some people get these and seem to like it for inclement/outdoor applications.
Here's another model from Grizzl-E that people like for outdoor use in bad weather. It can be hard-wired instead of using the NEMA plug. Both of these options have a NEMA 4 enclosure as well.
Grizzl-E Classic – GRIZZL-E
grizzl-e.com