You have to be involved in the community and network. That's how you get to know who's who. You don't want to just focus on your project either. You want to show a willingness to be involved with other projects as well. Start volunteering your time for other causes and you may find that many of the same faces are involved in different causes. Those are the people you want to know and show that you're willing to help. From there....you have to have a plan. Not just an idea but an actual plan...on paper with numbers and goals. Why do you want to do this? Who and how many people will it help? Is there also a mutual benefit for the community in general? Exactly how much money do you need and how will it be spent? You don't have to show this to every person that you talk to but you need it in your back pocket for when you do need to pull it out. You can also apply for grants but you will definitely have to provide details in your grant proposal.
Edit to say...if you just want to know how to contact people in charge of various organizations so you can get involved....just pick up the phone. Call the local chamber of commerce, call the local hospital and ask if they have a foundation, etc. Lot's of people could use your help.
I will just get back to everyone when my website is up.
And I do not have the ability to solicit (even online) outside of the state of Florida.
My goal is to raise as much as possible.