D5000 is good enough to take wedding shoots.
If you want the best cam, get a D3/D3X (for nikon system)
be prepared to pay tons of $$$$ for lenses, flash, accessories etc.
how to start?
starting shooting for frens, then as assistant wedding photog, finally as your own pro.
check out all the top wedding photogs' portfolios for ideas (e.g. imasaint, canturn, ckuang etc), and develop your own style.
post your wedding portfolio in CS to get feedback, comments and critiques.
attend wedding photog workshops. join wedding photographer associations.
etc etc etc.
to develop people skills, you just need to remember one thing..... be confident, yet humble, be creative, yet compassionate.