No worries! Everyone starts somewhere. I'm sure you'll learn a lot this time through. Kudos for choosing a great first incubator, too. It's worth the extra money.
I mean that you should have 2 or 3 hydrometers, rather than just one. They can show different humidity readings and therefore it's better to have two or more so that you can average humidity. It's more important to do this with thermometers than hydrometers, as temperature is more crucial. But the Genesis is pretty stable and shouldn't give you big fluctuations.
A hydrometer is a device to measure atmospheric humidity. If I were you, I would go to a pet store and pick up two or three digital thermometer / hydrometers. They tend to have two-in-one packages that measure humidity and temperature together. They can be pricey but are worth it. In my incubator I have a $30 food thermometer from
Walmart, an old thermometer/hydrometer for house temperature, and two reptile thermometer/hydrometers. I have a lot of devices that allow me to know the average temperature and humidity.
You can lift up the lid and add water. I would suggest buying a small spray bottle, filling with water about 100 - 105 degrees Fahrenheit and then putting it in the incubator and keeping it there. It will help you regulate temperature and it is helpful as you can quickly open it and pour some water into the troughs or even just spray a little water in the troughs depending on how much humidity is needed. You can also buy tubing for aquarium vacuums and stick the tube through the opened vent, position it over the trough and then pour water, using a funnel cup, through the tube into the trough. It can be a little difficult to get a hang of at first, but is very useful during hatching.
Feel free to ask me any questions!