Use turbo tax. It does the depreciation and keeps track of everything. It's very simple.
Here's the thing with taxes. The hard part is gathering all the information you need to fill in the forms. If you go to an accountant he is going to give you a form to put all that information on for him. Then he enters it into a computer which does all the calculations and print out the forms.
Programs like Turbo Tax do the same thing an accountant does (how much did you spend on advertising? -- how much did you spend on office expenses?, etc.) and walks you through step by step.
I would recommend when setting up your books for the first time, using as many of the categories that are on Schedule C which make sense to your business. It makes it easier when you do your taxes. Of course you may want to have some categories which are not on Schedule C, but it makes sense to build you categories around the IRS's ones as much as possible.