If what you want is to make your instrument sound, this is a very fast and very comfortable guide to learn how to make it sound and a couple of tips to play your first song.
The main thing even before we can position chords we need to know how to strum the strings to generate rhythms and play the best songs, do you know how to strum?
Before playing you have to sound tuned! If you are to compare yourself with the video you are watching, you have to listen to yourself and know that to play any song and before playing you have to be well tuned.
Since we fine tune and learn to strum, it is correct that you learn to position and know how to move your fingers quickly for a good fingering and perfect what we have seen so far