Start playing the different notes and hold the different shapes. Once you have a basic understanding of how the notes are played throughout the song, you can start to hold each of the chords. If the song consists of chords that you're used to playing, it will make the process easier. If the song uses different chords, it may take some time and adjustment to get used to them. Practice the chords separately if they are unfamiliar to you.
Now many people are going to ask about other brands, like why don’t I suggest Gibson guitars? It really is a personal taste thing, and it’ll ultimately depend on yours. Perhaps by the style of music you play or the artists you admire. For me, Fender guitars represent the best in quality and feel. Many Gibson style guitars have fatter necks, bigger frets, are heavy, and feel and sound “muddy” to me, whereas the feel of a Stratocaster– light, slender, classic– feels, plays, and looks fast. :)
Determine the guitar riff that you want to learn. Listen to acoustic guitar songs that you enjoy and choose one that you'd like to learn. When finding your first song, try to find a song that has an easy chord progression. Listen to the song and determine how many chord changes it has and the speed in which the song is played. If there aren't that many chords or the song seems simple to play, you should choose that song as your first song to learn.