SharpFoxDev

You've sent two links to a same song. But that's ok. How I would go around to learn this song as a beginner. Slow the song down a bit, it's pretty fast, when you get the muscle memory in, you can play it in normal speed. You will also need a capo to play this song, but I suppose you have it. Learn different parts of the song separately. Some pitfalls that I see in this song for a beginner: In the fingering part you can see that he holds first fret from capo on low E string with his thumb. Strumming part will be a little bit more complicated. Firstly there are barre chords, those can be tricky for new players. They are chords, where you hold all strings down with your index finger layed down across the strings and the rest of your fingers create the desired chord. You've said, that you only played open chords, so this song might be a good opportunity to learn to play barre chords as well. Ad strumming patterns: if it makes it easier for you, he plays all the strumming patterns in down strokes only. Some strumming parts are just regular eight notes, so that should be easy. Some strumming parts have more complicated rhythm. If you have some music background, you can learn it from the notes lengths in the tab, but what I found works for me when learning strumming patterns for different songs is to listen to the song and then try to mimick the rhythm with my right hand. You can do it with the guitar, strumming the pattern while muting the strings with the left hand, so you can solely focus on the strumming, or I do it even without the guitar when I am commuting and listening to music. You also have a video of the guitarist, so you can try to mimick his hand movement with yours. Again I recommend slowing the song down a bit. And last thing is that in one part of the strumming there is technique called palm muting (you can see it as X's in the tab), where you lay the pinky side of your strumming hand on the strings to mute them and strum with the pick across the muted strings like that. You could also technically mute the strings with your left hand instead of right hand. Hope that helps. Although there might be some new techniques to learn, don't let it discourage you, I found that learning my favourite songs, even though they were harder, really helped me stay motivated to play and progress with my skill. 

I usually try to search steam and google. Also don't forget, that even though there is no game of the same name you are planning to choose, there can be some other piece of art of the same name, like a movie or a book (happened to me with several names I was planning to choose from for my game), which could be displayed first over your game, when searching for it on google. Just something to keep in mind.