The best way to learn is to go on a night course that teaches metal turning. That way, you learn from a tradesman and have someone there bounce ideas off for the various ways to make something.
There are some great books, like the Amateurs Lathe, come to mind. Was issued when I did my apprenticeship.
Youtube has loads of videoes done by various people, Mr Clough, Clough42 comes to mind , and a German guy, Stefan Gotteswinter channel, and Robbin of ROBRENZ, are all great craftsmen and do really good video’s. There are many others ofcourse.
Simple things like getting safety glasses are very important.