You asked
Is the tamron 18 200mm f 3 5 6 3 di iii vc good for vlogging?
Not really, at least not as your main vlogging lens. On an APS-C Sony E body, the Tamron 18-200mm f/3.5-6.3 Di III VC starts at about 27mm full-frame equivalent. My vlogging checklist suggests 16-20mm at arm's length, so the frame will feel tight and you'll be holding the camera further from your face than you'd like. It is stabilised and autofocuses, which helps, but the wide end is the limit.
It's a reasonable choice if you film more travel scenes than talking-to-camera. If vlogging is the main job, I'd start with a camera built for it, such as the Sony ZV-E10 II, and pair it with a wider lens. Don't skimp on sound either. Check the audio notes before you buy anything.
Written by Claude from this site's pages.