Where do i even begin learning to sing?

[flat crown]

I want to start singing in a slightly more serious way,learning to improve my voice and sing better.But i got no idea where I should begin learning about this kind of stuff

tldr what are the basics of singing?where can i learn them from?

[strange palm]

I find youtube videos and also got books

Thats how I do

If not afford a teacher

[crude quartz]

Yes

[unborn saffron]

what books do you like?