Haha sorry about that little misunderstanding XD
Yeah the playing it sideways thing may take a bit of getting used to. Although I did play the guitar for about 2 months so I'm not exactly, uncomfortable with that. I think it would be weird not having a bow though XD
I think you'll find playing bass vastly different to playing a cello.
Different strings, much thicker underneath the fingers, playing sideways feels really uncomfortable (for me anyway) when you're used to playing cello, there's no bow...
So I wouldn't recommend tuning it differently.
Apart from having 4 strings, and being in the bass clef,... I don't think it's really comparable in terms of playing it.
However, it's a good place to start if you want to take up another instrument.