But as of late last week, the federal government's data hub reportedly had a 33 percent error rate for determining eligibility for those subsidies, and software engineers were working round-the-clock to fix the issue.
Insurers are counting on relatively young, healthy people like him to enroll to offset the benefits they will have to pay out to people who have pre-existing conditions, or who get sick. Under new Obamacare rules, insurers cannot deny coverage for pre-existing conditions, charge higher rates for the sick or bounce people from coverage if they fall ill.
(Read more: How do Obamacare exchanges work?)
"We're ready to go," said Kevin Counihan, the head of Connecticut's health exchange, during an interview Monday on CNBC's "Closing Bell."
"We're actually looking forward to getting going," said Counihan, whose Access Health CT exchange is operating retail outlets where people can walk in off the street, receive information about their insurance options and then sign up for coverage.
Recent surveys have shown that a majority of people don't understand enough about health insurance terms, such as deductibles, copays and coinsurance, to understand how much coverage really costs.
Many still unaware of launch
Other surveys have shown that most people are unaware of the exchanges, and that the majority of people most likely to benefit from them—those uninsured with low incomes—are particularly ignorant about the marketplaces.
Vernaglia, the Foley & Lardner health-care lawyer, dismissed concerns that the law is too complicated to people, and hence will hamper enrollment. "People don't understand their taxes, but seem to get those bloody things filed every year," he said.
Vernaglia also scoffed at the idea that the technical glitches some exchanges have reported will doom Obamacare by discouraging enough people from enrolling to keep premium prices affordable.
(Read more: Call centers standing by for Obamacare "boost")
"In any system, there will be glitches," he said. "American consumers are kind of used to things not working on the first day. ... There are problems with Apple's mapping technology—does that mean that people aren't going to use the iPhone?"
Still, Vernaglia said, "There's going to have to be a lot of public education" about the exchanges.
Ron Pollack, who started the advocacy group Enroll America to encourage people to sign up on the Obamacare exchanges, said the six-month-long enrollment period, coupled with a nearly two-month-long enrollment period next fall for coverage in 2015, will provide a lot of time to educate people and get them to enroll.
To date, Pollack said, "Virtually the entire discussion has been about the politics of the Affordable Care Act."
"But now that we're about to begin the enrollment process, people are starting to focus, and asking, 'What does it mean to me, what does it mean to my family?'" he said.
—By CNBC's Dan Mangan. Follow him on Twitter