If you don't know what you want to do there or whether you even want to be there I see no reason to go to college.
Not having been to college would in no way imply that you have less chance of being a successful trader. Provided you are reasonably intelligent and can learn, I think your chances are as good as a college graduate.
However, consider this. If you have the money to go to college and you risk it trading, be well aware that most traders fail and you may blow the chance to get an education. However, some traders do become fabulously successful and very wealthy. On the other hand, get a degree and it will open up employmnet opportunities that will serve you the rest of your life. It's not for me or anyone else to tell you how to handle your life, but think very carefully.
If you want to be a successful trader, be prepared to study as hard or probably harder than if you were in college, learn from your own experiences in the market as well as studying what others have written, understand your strengths and weaknesses and be prepared for disappointments and boredom as well as periods of euphoria.
After I started swingtrading at the end of 1999 I went 7 months of + or - 15% in my trading account while I developed understanding of what worked for me and what didn't. I then made 68% in the last five months of the year. This year, although I trade primarily long (anyone got a good refence to short setups?) I am up 21%. Again I was treading water from Jan to March and Jun to July, but April and August were really nice.
It requires tremendous perseverence and self-discipline to stick to your plan during months of sideways performance waiting for the right conditions to come together for your strategy to work for you. I am sure daytraders have similar frustrating sequences of trades, but over a smaller timescale. If you are easily frustrated and prone to impetuosity, trading is probably not for you.
I doubt that you have a lot of capital, so you will probably have to take a job that allows you to trade also, as don't think for a minute that you can take $10,000 and be a good enough trader to live on your gains. Working the nightshift at McDonalds also will not be a lot of fun. When you have $50 - 100,000 built up and have been successful for 2 or 3 years you might consider going full-time trading.
Try reading the book "How I trade for a Living" by Gary Smith to see the multi-year struggle he went through on the path to becoming a successful full-time trader. Be prepared for a similar stuggle - it ain't easy.