How bad are guitar playing and solo?

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If you sing while playing, the audience will mainly pay attention to the singing part and your appeal.

If you play solo, the audience will pay more attention to your performance.

As far as the difficulty is concerned, playing and singing is relatively simple, and a few broken chords and basic chords are enough.

Solo, on the other hand, requires more skill.

By the way, there are usually more classical guitar solos.

Folk guitars are played and sung a lot.