Which RVM and Ruby version do you recommend?

Sorry for the novice question, I'm a .NET developer but I figured I'd give Rails development a shot. I found a tutorial that recommended installing RVM and using ruby 1.9.2. So I installed as instructed following the indicated versions, but when it came to running bundler to install packages there seemed to be a version issue (conclusion after searching the error). I ended up manually installed the extra packages (only sqlite3 1.2.5 at the time) but then had further issues.

To cut to the chase, I got pretty fed up and decided to start looking for something more up to date and still ran into issues. So I figured I'd ask here. Which versions of ruby, rails, bundler, sqlite do you find work best together? For reference, I'm running Ubuntu 15.04 in VirtualBox. Also, slightly off topic, but do you feel this kind of issue is common?

Thank you in advance