I let mine load up every Watch-compatible app, then tried them all, deleting the ones that either malfunctioned, were useless, or didn't jibe with how I think a Watch app should operate. I mostly ignored issues with loading times because I wanted a better idea of what would remain useful as native apps. News reader apps reveal a range of philosophies about what developers want to do with a smartwatch.
Also: Force Touch everything. Doesn't hurt to try. I didn't realize until the other day that, unlike a browser's Back button or closing a Finder window, you can't lose your place in an app with Force Touch. No harm at all in seeing what pops up (or finding out that an app doesn't use it anyway).
I took a leap with notifications and turned my phone's vibrations off completely, relying on my Watch to grab my attention. It works really well. You know how a vibrating phone is still obnoxious sometimes? When I put the watch on silent, its taps are so quiet, nobody else can tell when I've received a notification.
Charging: I charge mine before bed, usually after my shower (I rinse mine off each night) while we're sitting around having dessert. When I'm ready for bed, the watch has recharged to at least 90%, and I put it on. The taptic alarm wakes me every morning, and I can see the time before I reach for my glasses.