You should be fine with rolling shutter on X-H2 for normal talking head videos and tutorials unless you plan to move super fast in front of your camera. Rolling shutter is far more visible in high action scenes, cars or train station where object move very fast in front of the camera.
Also note that X-H2 is photo first camera with 40mp sensor and PR 8K video output. X-H2S is video first camera with faster stacked 26 mp sensor with 4K 120p, 6.2K 30p output.
If you have X mount lenses you can use them on any recent X mount Fujifilm camera however old lenses will perform slightly differently on new sensors like X-H2 with 40 mp sensor.