Yep. Play it slowly - as slowly as you need to to play it properly. Don't play along in time, to a metronome or the tune. in fact don't worry about timing at all until you have the notes and fingerings right. If you slow down on a difficult part that's fine, it's more important to practice it properly than to repeatedly play some parts incorrectly because it's too fast.
And enjoy the process of learning, don't worry about nailing the whole song, that will come naturally in time.