So, can you check that you configured port-forwarding on your internet box. c.f. YunoHost • index
(Also 96.18.x.y is not your local IP, it’s the global IP, a local IP typically starts by 192.168 or 10.0)
More info on finding your local IP in “Finding your local IP” here : YunoHost • index
Again, this is not the expected scenario. Traditionnaly it’s expected that server have no graphical desktop environment (apart from web interfaces, but that’s not a desktop environment), nor is it expected to have a screen or keyboard plugged in. It’s okay if you find it really useful to have this or have specific need, but otherwise it’s really a waste of ressource…