I have just come into possession of this plant/tree and I'm hoping to find out three things:

 - What it is
 - How to look after it
 - If I can train it

I don't know much about it except that it is over 15 years old (probably much more but I don't know much of its history) and it's always been in this same pot. There's a rather dense moss growth in the pot, too.

I'm in Melbourne, Victoria, Australia (if that helps with care guidelines).

With regards to training, I don't want to do anything too dramatic; mostly just stop it growing a way that will tip the pot over - just evening it up a bit.

I've attached two photos - one of the whole thing and one (rather poor one) of the leaves and branches in case that helps with identification. I'm told it's a succulent which makes sense because the leaves are quite turgid.

Some of the leaves are slightly yellowed with speckles on them - should I be worried about that?

I don't mean to ask too much; any information about it would be a huge help.

_<sub>Click photo for full size</sub>_

[![enter image description here][1]][1f]

[![enter image description here][2]][2f]

  [1]: https://i.sstatic.net/qnhg3l.jpg
  [1f]: https://i.sstatic.net/qnhg3.jpg
  [2]: https://i.sstatic.net/CSboZl.jpg
  [2f]: https://i.sstatic.net/CSboZ.jpg