Let's start at the very beginning, a very good place to start
When you read you begin with "A B C", when you sing you begin with "Do
Do Re Mi, the first three notes just happen to be "Do Re Mi" DO, RE, MI, fa, so, la, ti, do!
Doe, a deer, a female deer; Ray, a drop of golden sun;
Me, a name I call myself, Far, a long, long way to run;
Sew, a needle pulling thread; La, a note to follow Sew;
Tea, a drink with jam and bread;
That will bring us back to Do-oh-oh-oh!