You asked
Is the sony e 18 55mm f 3 5 5 6 oss worth it?
Yes, for most people starting out on an APS-C Sony, I think it's worth it. It's a light, stabilised kit zoom that covers the wide-to-standard range well. It's the kit zoom of the early NEX bodies, so it's easy to find and pairs naturally with the APS-C bodies, like the Sony a6400 or Sony a6100.
The catch is the aperture. At f/3.5-5.6 it gets darker as you zoom in, so it struggles in dim rooms and gives less background blur than a faster lens. If that's what you're after, read the lenses guide on aperture first. If you're mostly shooting in daylight, travel, or everyday snapshots, it does the job.
It also fits full-frame Sony bodies in APS-C crop mode, but you give up resolution there, so I'd rather use it on an APS-C camera. For more on that trade-off, see sensor sizes.
Written by Claude from this site's pages.