I'm an elderly student bassist of about six years learning lacking any music training, experience, theory or much talent. I agree that a keyboard is the ideal instrument to learn on so I bought a pawnshop Casio keyboard and some books. Didn't work out though, keys are about 375% more difficult to play than a bass. Just by using TAB and learning the finger box patterns for major, minor, blues and the pentatonics scales I was belting out (bad) I-IV-V 12-bar blues in not much time at all. Whereas the textbooks for piano had no such cheats and expected me to learn to read music! Learn a few finger box patterns and play them anywhere in any key on the bass guitar. Apparently a keyboard has a different fingering for each scale and each key! Overwhelming amount of stuff to learn. I'm not too old to play music but I am too old to learn to read music. If you are young then keyboard instruments are ideal for learning all aspects of music. No time for that if you are approaching dirt nap age. Anybody need a hardly used Casio keyboard?Yes. In the OP's case, it reads as it he wants to learn to play a string instrument, and play along with records a bit.
Any instrument takes time to become somewhat proficient, so adding a different instrument - usually suggested to help understand music theory - takes away from the time the OP will need to invest in learning to play a primary instrument.
He has expressed no interest in learning keyboards/piano or music theory for that matter (IIRC). So yes, at THIS point in time, as far as I can ascertain (which is, admittedly, about as far as you can - IE we're both guessing) I would say that it would definitely take away some of the fun.
