Barbecue grills can either be portable units on wheels or casters - some even fold up for easier storage - or built-in models that are permanently mounted. They may use either propane/natural gas or wood/charcoal as fuel.
A beginner will find a gas grill to be the easiest to cook on. Cooking on a gas grill is much like using a stove: the flame is turned on and off, and heat is controlled with knobs. A portable gas grill will be more affordable than one that is permanently mounted.
One of the easiest ways to clean a barbecue is to turn the heat on high and "burn off" anything stuck to the grates. Afterward, a wet brush or metal scrubber on a long handle will scrub off any burned material. The inside of the grill should be cleaned periodically (when cool) to prevent grease fires.
When it comes to ease of cleaning, gas grills are by far the easiest because their fuel - propane or natural gas - leaves no soot or residue. With a gas grill, the only cleaning necessary is the removal of stuck-on food particles or grease.