If you want to teach yourself, you should buy a copybook. Those who have a writing method are slim when they study online, and it is not good to stare at the computer for a long time, so they are easily distracted.
To learn calligraphy, you should do some very basic things strictly by yourself, and you can't do whatever you want, otherwise it will have far-reaching influence, but it will be a bad influence. Such as sitting posture, pen holding posture and related distance. Be patient, don't worry, take your time. Every stroke should be carefully written in place.