Do you believe that you can do anything that you set your mind to? It’s true, but within reason.
Studies have shown that it can take up to a year to form a new habit. It honestly depends on your level of determination and lifestyle (how much time you have). Some people can implement habits sooner, no doubt.
Start small. Don’t jump all in thinking you are going to instantly change the way you have been your whole life or most of your life.