You asked
Is the 7artisans m 35mm f 2 8 hard to focus manually?
The site doesn't say how hard this lens is to focus by hand. The 7Artisans M 35mm f/2.8 is manual focus only, with no autofocus, and it's made for Leica M bodies on full frame. Beyond that, I haven't tested it or written up how it feels to focus, so I can't give you a verdict on ease.
If you want to see how a 35mm fits your shooting, the portraits page explains when a 35mm works well, mainly for environmental portraits and groups. For broader lens choices, the lenses guide covers where a manual-focus prime fits into a kit.
Written by Claude from this site's pages.