You're in an excellent position, having worked to build up some capital and having low expenses (living with your parents).
If you have a passion for something, that's probably an indication that you might want to look further into it to see if it's viable.
Have you taken a look at the Small Business Administration website
? They have a ton of resources there for people who are contemplating starting up a business. If you've not run a business of your own before, their advice could help get you off on the right foot.
You might also consider contacting SCORE
(Service Corps of Retired Executives). They can provide you with free mentoring from an experienced business pro to help you avoid a lot of common newbie missteps and really get yourself going.