Watch the Careless Love online guitar lesson by Brooks Robertson from Essentials: Boom-Chick Fingerstyle Etudes
The breakdown video is where we can slow down and take a closer look at what's going on within this arrangement. You'll want to strive for solid technique, a steady, driving, alternating bass pattern with your thumb, and most importantly good tone production. The bass strings should be muffled, while letting the treble strings (where the melody is played) sustain clearly. Try to take sections of 2 - 4 measures at a time and only work that section until you have it down and memorized, then move on to the next measure(s), and so on.
At first, be sure to practice very slow, striving for accuracy. If you're up for it, use a metronome. As you work up to playing at faster tempos, be sure to play the entire song at the speed in which you can accurately play the most challenging part or section. Again, don't forget to reference the tabs and notation. It's good to be aware that there are numerous variations possible in terms of alternate phrasing, syncopation, anticipations, etc.