Welcome djzzz, You're new to diving and you have a problem, thanks for turning to us on Scubaboard. Most of us won't have a Nemo compurter, but a lot of us have other brands. Within this Board you'll want to learn to navigate. . . it's much easier navigating here than underwater.
On the top of each page is a "bar" with choices, click on "Forums" and a long list will drop down, everything on that list will open up a topic with lots of opinions. . . There are topics to search for regulators and gauges and computers. . . ask your question there and you'll be talking with people who have the same equipment.
In another area, you'll read about advice to new divers, opinions from beginning divers and very experienced divers. Your opinions count too! Your information doesn't tell us where you are or how much experience, fill that out and you can ge more customized advice. Also, scroll way down on the forums list and look at "Travel. . . " under United States you may find a group of divers in your location, or nearby. If you are in the midwest like I am, Midwest Muck divers forum will discuss area lakes, hunting fish and get togethers at lakes with everyone invited to join. If you are in another part of the country look up your area and join in.
Right now you have questions, and there are people here that can answer them, just go to where they are hanging out. There's lots of help here, and soon you'll be the one helping someone newer.