As a teacher myself I’m always on the look out for free sites/games that will benefit students in particular with their typing skills. I came across this website: http://www.typeonline.co.uk/typingspeed.php which tests your speed and is also great for advanced users to practice their typing skills! - I’m in no way affiliated with that link/site btw, its just something I used myself during my classes - hope it helps you out
Online tutorials are very effective way of working through that. There are video online tutorials also. Some of them are free of cost while some are paid. You can look for your interst. It can be a effective way of doing online learning.
When people don’t know how to use the Mouse, I tell them to play the different solitary games that are installed with Windows. They have fun while they learn how to use it and control the clic, double click and drag movements.