Don't let the term "tablescape" intimidate you, it simply means how you decorate your table for a party. The good news here is that you can make as personal and individual as you. So now that you know what it is -- here's a guide how to create your perfect tablescape.
Start with a color. For example, say you're hosting a Fall dinner party. You can play with all types of color schemes such as reds, oranges, and, yellows. For the holidays, green and red are perfectly suited. Having a New Year's Eve party? Use silver and gold metallic colors.
Whether you use a tablecloth or place-mats, linens do help your table look more polished (or finished.) If you decide to use a tablecloth this article and video give excellent instructions how to properly drape your table: http://table-setting.wonderhowto.com/how-to/box-tablecloth-for-catered-events-382303/
Keep in mind that your napkin selection helps to set the tone. Paper napkins tell guests things are less formal, and, cloth napkins tell guests things are more on the formal side. If you would like to create a fancier napkin other than just placing it next to the plate, this article offers 20 different napkins folds with step by step instructions: http://www.delish.com/recipes/napkin-folding/
Once you have decided your color and linens, next select your centerpiece or centerpieces. This can range from fresh flowers to candles to fruit to anything you'd like to use to help set the tone. The key here is height. Whatever you decide to use as your centerpiece, sit at the table, and, make sure it is either low enough or high enough not to block your view of the person across from you.
Depending on how formal your party will be determines how many glasses you need for each place setting. If it is a rather informal occasion with friends and family then yes you probably can use just one glass. Just make sure the glasses compliment what you are doing regarding color and theme. As a rule of thumb, you'll want at least one water goblet and one wine goblet per person.
This is a good example of a water goblet that would work with nearly any tablescape: http://www.crateandbarrel.com/jane-water-goblet/s381519
This is a good example of a wine goblet set that will work with nearly any tablescpae and allows you to have the proper wine glass for the type of wine being served: http://www.bedbathandbeyond.com/1/1/62581-vintners-12-piece-wine-tasting-goblet-set.html
Have you seen a plate on top of a plate? The bottom plate is larger than the plate on top and it is called a charger. Chargers are by no means mandatory, and, finding good chargers can often be a challenge. Some excellent chargers can be found at stores such as Bed, Bath and Beyond, and, they have chargers for nearly every budget: http://www.bedbathandbeyond.com/1/3/plates-chargers
The plates you select also help set the tone of your party. If you are just starting out and can't afford to purchase more than one set of "good" dishes, stick with a neutral such as white or bone that will work for any occasion.
Flatware simply refers to knives, forks, spoons, etc. If you have real silver be sure to polish it before use. If, however, you do not have silver, it is acceptable to use stainless steel. This website is an excellent source of how to properly set your flatware and gives wonderful illustrations how your table will look once it is done: http://www.925-1000.com/settings.html
And that's how you create a tablescape. It isn't hard, and, anyone can master the art of tablescapes with just a little practice and imagination.