How badly do you want this?
That is a question each individual must ask and answer for him or herself.
There’s nothing wrong with writing on the side, or writing only because you enjoy it, not because you plan to make it your career. It’s simply a different approach.
If writing is to be your vocation as well as your passion, it must be a priority. There are no excuses, there is no such thing as “no time to write”. You re-shape your life and people in it with those who will support your work.
That doesn’t mean surrounding yourself with people who only pamper and praise you. Constructive criticism is important. Nor does it mean you get to be selfish and never consider the needs of anyone else in your life. But it means having people in your life who respect your needs and your boundaries.
If you want it badly enough, you make the changes in your life necessary to make it work.
If you don’t, take responsibility for that choice and act accordingly. Don’t blame others, and don’t use friends and family as an excuse because you don’t have the courage or commitment to go for it. Say, “This was fun, but only a hobby.” There’s nothing wrong with making that choice. It simply defines a different career trajectory.
You’re prepared — tomorrow, you begin.