But you know how good you'd like to play, and that is a massive undertaking: Playing on a fretless neck, bowing, keeping high body tension throughout, the sightreading requirement (tenor clef anyone?), the character of the instrument and the relevant cello pieces expecting virtuous play, are all compounding factors that make it really hard, with no clear goal:
Get some friends out of their musical retirement? Be the novelty instrument in a alternative band? Find an orchestra or quartett that's beginner friendly and ...cool?
Meanwhile, the return on a minimal investment in guitar playing and a bit of singing is almost comical. Also plenty of bands need a bass player and you'll easily find a group of cool people to play with even if you're just starting out and in your 50ies. Want more? Try the piano; moderate effort will enable you to play all pop/rock songs.