I don't have a good resource to refer you to, except in general for you to peruse Amazon for well-rated books, AND to try and find a good accountant in your city that you could pay for an hour of her time for advice.
My earnings are quite sporatic, and I've gotten in the habit of just taking 50% of whatever I earn and putting it in a savings account earmarked for taxes. For your first year, you won't have any penalties for not paying quarterlies, but in future years, you'll need to or face paying the (small) penalties. No matter what, you'll always have to pay the FICA tax, but you should be able to shelter a lot of the rest in a Solo 401K, which is what I use for my business earnings.
The TurboTax website has lots of good information with really clear wording that I have used in the past as I've studied for my VITA tax volunteer work.