I'm going to throw some real basic things out there, because, whether you'll believe it or not, these things can be misunderstood.

Power: Single cable. Single option. If you can plug in a lamp, you can power up an AppleTV
Video: Single option yet again. HDMI. You need a TV or receiver with an HDMI port. Usually an HDMI cable is not included when you buy an AppleTV, so you will need to provide your own. They're cheap and available most anywhere that sells electronics.
Audio: Here's where they get crazy. You get TWO choices. If you just plug it in through HDMI, you're set. You also have the option of using their optical audio output (Toslink). If you don't know what this is, you don't need it. So far, so good. You need 2 cables.
Network connectivity: 2 choices, again. One is an ethernet cable (not included, must purchase your own) if you want to hardwire it to your network. There is also a WiFi card built right into the device, and the setup menu takes you through connecting to a wireless network if it doesn't detect an ethernet cable

Now that the hardware side is taken care of, we get to the software side.
You'll need to sign in with an AppleID (the same as the iTunes one you probably already have). Apple has some movie rentals and purchase options built into the interface. This same ID will let your iPhone, iPad, or iPod Touch control the device through a remote app that you may download (if you and your husband use different iTunes accounts, only the one you log in with will be able to control the device from the phone. This is no big deal at all- the remote it comes with works fine. And the device is capable of learning ANY remote so long as you have the original one or a phone/ipad linked to control it).
Apps: each app will require you to log in with some sort of account. If you use Netflix, ABC, ESPN, and HBO, you'll need to log into each app with the correct account (your Netflix account is its own thing, your ABC and ESPN accounts are through your cable provider's username usually, and then HBO is through HBO Go, which can be either through your cable provider or the standalone HBO service). Once you're done with that, you're done logging in for good. But the point I'm trying to make is that you may need 2, 3...7 different account username and logins to get all your apps up and running. It's no big deal or real pain to do, but if your husband knows this account info and you don't, you'll not be able to use much of what the device has to offer. So just be sure that you've got it handy when setting up.

All in all, 30 minutes would probably be the upper end of time required (excluding firmware updates that may need to occur) to log into your WiFi and then each streaming service you use. And, as I attempted to long-windedly explain above, so long as you know your Network/WiFi, AppleID, and network streaming service username and passwords, you have more than enough tech know-how to set it up.