There are participants on this forum who can give you more detailed answers, but as for some rough estimates:

A good rule of thumb is to provide about 100 square inches of lifting area per pound of weight. Naturally, there are other considerations, such as the airfoils used, drag of the airplane, power used, lift increase provided by flaps, etc., but planning for a reasonable amount of wing area and wing loading can be used to get a rough idea of the airplane's performance. Scale affects this, too. A wing loading of 24 oz./sq ft. would be rather high for a small sport model, but would be quite low for a large model. (Search this forum for much more info)

Aspect Ratio:
This is the ratio of the wing's chord to it's span. For example, an aspect ratio of 6 would exist if the wing chord was 10 inches, and the span was 60 inches. (60/10=6) An AR of 5 or 6 is typical for sport planes. Jets and other "hot" planes tend to have lower ARs and higher loadings, where gliders have much higher ARs and lower loadings.

Wing loading:
It's the weight of the airplane divided by the wing area. For example, use a 6 pound plane (72 oz.) with 600 square inches of area. 72 ounces divided by 600 square inches = 0.12 ounces per square inch loading. Multiply it by 144 to get the more often used figure of 17.28 oz/sq. ft.

Good luck.