Just start where you are right now. Obviously, you have some realistic goals as you mentioned in the question. That's Great.
Choose Business area(sector/service) aligned with your lifegoals and interest and Just start.
Maintain discipline(Must).
Create interest,
Develop self motivation,
And just work without outcome pressure.
Lets develop the buds of your interest in your chosen area for two to three months.
If you maintained the above honestly, you will find your road of success along with Entrepreneurship.
Test and fail practically is far better than not tried and feel failed.
Just go ahead and better start rather than regret of not acted upon.
Wish U great success in your life
Thanks and chill always..

P.S. If you like my views and want more details, feel free be in touch.