How do I ease into being better?

Hi everyone!

I am ready to "be better" - I am armed with self help books, sage, meditation apps, a journal, and other various things that will help guide me through this (scary) journey I am about to embark on.

My question is: how did you ease into "being better"? I am afraid if I make too many changes at once, I'll fail. I want to quit smoking, drinking, dating, staying up too late, eating shitty, my dependence on social media, etc.

Any advice would be much appreciated. :)

Peace & Love!