There are several options. 1. Today they make beautiful affordable artificial trees that come with the lights already in them. They are very realistic and can be used for several years. They come in a box, put the segments together and plug in the lights.
2. If you want the experience of a real tree, there are Chritmas tree lots, where the trees are precut. (they are grown on tree farms specifically for this purpose, so we are not depleting a forest somewhere.) You select the one you want (be sure to measure your ceiling height before you go,) the lot workman will bundle the tree in netting (be sure to ask him to cut the trunk) and help you attach it to the top of your car, or load it if you have an SUV or truck. Tell him you need a stand that will hold the size tree you selected. If they don't have stands there, you can get one at any store (like Wal-Mart or supermarket.) When you get it home, place the stand where you want the tree, before you cut the netting, fit the trunk into the stand and secure the screws into the trunk and center it. Remove the netting and fluff out the branches. Fill the basin of the stand with water and be sure to add water everyday. Christmas trees get very dry without water, the needles will fall out and it's a fire hazzard.
3. Go to a Christmas tree farm. Depending on where you live, there are farms where you go hunt around for a live tree, when you find the one you want, they give you a saw, you cut it down and an attendant will take it to the payment area where you can have them spray it with flocking or glitter if you want, or keep it plain. They will bundle it in netting and help you tie it to your car etc..
4. You can hire a Christmas decorating company. You pick out the decorations, tree etc... they come to your house set everything up and after the holidays, take everything away and store it for you until next year. It's expensive, but if it's in you budget and you entertain a lot they do beautiful work.
Prices vary widely. You can get a good looking artificial tree from $100.00 to $300.00 at a Wal-Mart type store, or you can spend up to $3000.00 at a boutique store. Real trees start at about $100.00 then go up depending on the size and kind.
Artificial trees are stored away in the box after the holidays, real trees are either picked up by the trash service in your neighborhood, or they have deposit points where you can bring them. They are usually recycled into mulch, or tossed into lakes for natural nesting areas for fish.
For safety, my rule of thumb is if you do not have a fire place, or you have one that uses gas logs, a real tree is ok. If you use a real wood burning fire place go with an artificial. In any case, keep it far away from the fire place. And unplug the lights when you go to bed. Hope this info gets you on your way to a great first Christmas tree.