practice exercises 28-33 in your guitar instruction book
practice your open chords
next week I'll show you how to play barre chords
practice playing the intro riff so "sunshine of your love". Just practice the highlight yellow notes.
here's the guitar tab to "stairway to heaven" like you wanted. I put some videos below to help you get started with the song.
I also put a playlist of jam tracks below that you can solo over using the major scale I showed you last week.
practice your major scales while jamming over the jam tracks below