Like WooingWyandotte suggested, check out
HSLDA (Home School Legal Defense Association). Their
NY State Laws should answer a lot of questions and will be a BIG help if you ever have legal issues with your school district. Also see if you have a local
LEAH (Loving Education At Home) group to connect with other home schoolers in your area. A lot of the groups will have gatherings, field trips, pot luck dinners, art fairs, etc. to help you get involved.
I was homeschooled all the way through high school, same as my older sister. My younger siblings are being homeschooled as well. We did Sonlight for a few years and then had an eclectic program. Sonlight helped a lot with history book ideas. Math was Saxon and then Teaching Textbooks, which has CD-ROMs with the lessons. History was a bunch of different stuff. For the most part, we used TruthQuest as our spine, and read a lot of the recommended books in there. In high school I read Albert Marrin's historical books, and they were very engaging. TruthQuest is for all ages, but for the American history they have Younger Students and then the trio of the Age of Revloution, just so the older students can delve deeper into the more thought-provoking issues. I did Calvert School's Spelling CDs, but for my brither it didn't work, so he has a workbook. Writing was based on the
Institute for Excellence in Writing, and we would use the history cards from Veritas Press to make keyword outlines, and combined writing with history, and did what we called a History Notebook. English/grammar was Shurley Grammar and then KISS grammar. Shurley is a good starting place, and gives you a good foundation to jump into the KISS grammar, which is free online (you can print off the worksheets and teacher's guide). Science started out with the Usborne books from Sonlight and then graduated into Apologia Science in 8th grade. (Highly recommended if you enjoy science at all!)
I agree with what WooingWyandotte said about pros/cons. So I won't restate it all.
Good luck and have fun!