Focus on your startup and don't sweat the minutiae details. As long as your accounting skills are basic enough to balance a checkbook and to make sure you don't overdraw your accounts, you're OK.
I took both managerial and financial accounting in college and learned more just doing, reading online, and watching the bookkeeper at the property management firm that I used to work for. There's no sense learning a bunch of things that you won't apply (which is often the case with accounting classes), when you could be devoting that time to building your business.
"The first lesson of economics is scarcity: there is never enough of anything to fully satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics." Thomas Sowell