You asked
Should I upgrade from the sony a5000?
Honestly, I wouldn't upgrade the body yet. The a5000 still makes a 20.1-megapixel APS-C picture, and its main weakness is that it has no stabilisation in the body. If slow shutter speeds are the problem, a stabilised lens fixes that more cheaply. The Sony E 18-135mm f/3.5-5.6 OSS is a good all-round pick for the camera, and the Sony E PZ 16-50mm f/3.5-5.6 OSS is a compact option.
Lenses are where the money goes furthest, so start there. If you do want a newer body later, buying used is a sensible way to get one. For the rest of the kit, see the first camera guide or the a5000 page.
Written by Claude from this site's pages.