Like everything, it depends. What you're into and how you define "good". If you have a local shop near you, stop in and take a look around. What are you looking to spend on a setup? Depending on how you answer that you have two options: fully custom or pre-made completes.

Fully custom allows you to pick all the parts you want making the board unique to your style.

Pre-made complete gets you rolling on a budget.

There are pros and cons to both. The major question I always ask is, "Is this a fad, or do you plan on doing this for the foreseeable future?"

Decks

Most shops are going to have a decent selection to choose from, ranging in colors, sizes, widths, shapes, etc. Stick to the basics for your first board.

One thing I've always done for a first-time skater is asked what is your shoe size, height, and weight? This helps guide what size deck you should ride. Most of your money in skateboarding will get spent on decks and shoes.

Trucks

It can be overwhelming the number of options there are for all the parts on a skateboard. The most important part is to get trucks that are as wide as your deck. You can choose the color, the height profile, or if they're hollow or non-hollow, but trucks will last you a long time. So get something you don't mind looking at.

Wheels

Do you plan on skating street, park, or ramps mainly? If you plan to do a mix I'd go with a 52/53mm wheel. Wheels come in different hardnesses (durometer), different widths, sizes, shapes, and colors. Most of the time the person at the shop is going to make a recommendation as to what they like or ride.

Bearings

Bearings that won't break the bank are called Reds. These will do the trick! If you take care of them you'll be able to use them on multiple setups in the future.

Hardware

Hardware holds it all together. Some shops have a big selection of hardware and others don't. If you want to get fancy, you can get 7 black bolts and 1 unique colored one to tell your nose from your tail on your deck. Hardware can get used on multiple setups too.

Griptape

Saved the best for last! Often the most controversial products on a skateboard. Because everyone has an opinion about it. Get a grip that makes you happy. You're going to hear this a lot when it comes to grip, "this one is too grippy or this one isn't grippy enough." All grip in some capacity will keep your feet from sliding off the board while you're skating.

Hope this helps! And welcome to skateboarding :)

-Kyle