There's an 'introduction to piano' chapter in Rufus Reid's "Evolving Bassist." That's a must-have book anyway, and that chapter will help you get off the ground. Chris Fitgerald, our highly esteemed moderator, has some introductory exercises on his website - you could PM him for more details.
A good book, if you don't expect to be a piano player but want to use the piano to improve your bass playing, is "Jazz Piano Voicings for the Non-Pianist" by Mike Tracy. I bought this from the Aebersold web site.
I've been dipping into the piano this year since buying one for my small children last Christmas. I don't get a lot of time with it, and mostly what I've learned is that I'll never be a piano player

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Andy