Eleanor Rigby... It only takes E minor and C major chords... pretty easy to learn and you get your first Beatles song under your belt.
If you can figure out what key is most comfortable for you to sing in and learn the 1-4-5 chord structure for that, you could play about 80% of all the songs ever written.
If you aren't sure what I mean by 1-4-5, (almost always shown as Roman Numerals), it's whatever root chord, let's say C in this case... and counting that as 1, count up to the 4... thus F... and the 5 would be G. Playing C, F and G, or any other 1-4-5 combination like D-G-A or A-D-E or E-A-B... Like I said, find your voice, learn the chord fingerings and have a blast!
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