I think your jade plant looks like Trailing Jade, Kleinia petraea, rather than the more upright Crassula ovata (Jade Plant). Trailing Jade has a more viney, trailing way of growing. It does great in a hanging pot, if that is an option for you. Just make sure the pot has lots of drainage holes!
If you trim it up when you re-pot, the cuttings are very easy to root.
It needs more light to have a less leggy growth, but it will still trail over the edges of the pot.
Also, excessive fertilizer can cause stretched, weak growth. I'd hold off on the feeding until it settles in, then be very conservative.
Once it's in a proper pot with good drainage and fast-draining soil it will be easy to water correctly.
