Hi MOH
If you have completed Tony’s 30-day challenge, then you are most definitely in the position to learn and play a song. It will just take extracurricular activity, on your part, in addition to continuing Tony’s challenges.
There are many three-chord beginner songs to choose from.
What music genre do you like?
For example, Bob Dylan’s earlier music from the 70’s is acoustic and often just three basic chords. The same is true for many other genres of music.
Do a Google search and find that perfect song to start! Just keep in mind, you will still have to practice the song regularly to get ‘showtime’ ready.
Tony’s 30-day gave you all the tools you need to learn and play songs. Tony’s ongoing challenges introduce you to new concepts to then improve your playing ability. That is something to be very excited about!
For example, I am learning to play ‘House of The Rising Sun’ by the Animals. Each day I spend a minimum of 10 minutes practicing the chord progressions so I can change chords smoothly enough to begin adding finger picking with the chords. My goal is to learn half a dozen songs to strum by the campfire this coming summer.
Tony’s challenges keep me learning innovative approaches and fretboard skills. This in turn will help me play better overall and expand my playing ability.
I hope this helps. Happy playing.