Beginner in SM diving

Hi,
I'm a belgian and coldwater diver. I dive mostly in quarrys.
Because I problems with my back and I still want to dive, I'm thinking about diving in the side mount system.
Here in Belgium it's rarely that you find something about sidemount.
That's why I registererd on this forum.
I'm a beginner in side mount diving. So every advice I can use.
For example: if I want to start SM diving, which system (ready to dive) can I use, suitable for coldwaterdives?
How about weight systems? Are you using weight belts? Which divebottles can I use (european)?
Thanks

Take a look at the Side Mount Divers sub-forum here on the board. It's full of specialist knowledge