PLEASE talk to a tax professional come tax time - the IRS is going to start really cracking down on Schedule C filers this year. (Too many people fudging their income and expenses trying to get the largest refund they can... legally or not.)
Anyway... federal income tax depends on adjusted gross income after expenses, deductions, and exemptions. Running with your estimate of $11,000 and only taking off standard deduction for single and one exemption, I came up with $166 federal tax, plus whatever for self-employment tax. (Understand: that number is a *very* rough estimate - I was using the 2008 tax tables, and I didn't work out your self-employment tax, so I didn't deduct half of it from your AGI... yes, you get to do that. Plus, if you had income from any other sources in 2009, that'll change the numbers too.)
Before tax time, you need to make sure you have a good record of all your income and expenses. (Any and all expenses, even if you don't think they count. Very few businesses have no expenses, and not claiming any is a red flag to the IRS. Besides, business expenses are deducted from income before figuring any taxes, which includes self-employment tax, so the more you can claim the less you have to pay in taxes.) If you have all this together and ready at tax time - receipts, invoices, everything - your tax professional will bless you.
Best of luck! :-)
Edit: Yes, you can take standard deduction even when using a Schedule C - I've done it in the past with self-employment income. And while I have done my own Schedule C's and SE's (and not found them difficult), if you're nervous about them, then paying a tax professional is the best choice for you.
www.irs.gov - 1040 instructions, Schedule C, Schedule SE
H&R Block tax specialist