That lesson is made for beginners, we will not do into details here, we will see how to use adjectives in the nominative case, then, you'll be able to learn a list of adjectives.
The gender of the adjective
There are three genders. The masculine adjective is ending by -ый, -ий or -ой, a neutral adjective by -ое or -ее, and a feminine adjective by -ая or -яя.