WELCOME!
My advice... you'll never know unless you try.
People wonder how in the world they'll go grocery shopping with children in tow, but they adjust. They wonder how they'll be able to take a shower with a baby at home, but they adjust. Homeschooling is a lifestyle adjustment just like anything else. It's frustrating at first when you're trying to find your groove, but it gets easier.
Another thing to consider is that homeschooling, on average, takes only 30 minutes per grade level, per day to complete. You'd probably spend no more than 1 hour with a K-1st grader each day actively teaching or working on a project together. That doesn't mean you're not "teaching" all day, because of course you are! Even when they're babies and toddlers, they're constantly learning. The learning never stops just because there's suddenly a label ... "kindergartener".
Anything that you can't teach effectively can be taught in another way. You can rely on a DVD teacher, computer program, co-op class with other homeschooling families, private tutor, or a homeschool academy (a part-time school for homeschoolers... you go 2-3 days/wk to "school", and spend the other days at home doing the assignments).
And then of course, there's this board where you can ask all the questions you want and vent all the frustrations you want. No matter what you're up against, there's probably someone here who has BTDT and has lived to tell the tale.