OP,
If you are already familiar with outdoor organics, then i think you should pick it up pretty fast.
If on the other hand, you plan to use bottled nutrients, i'd choose soiless all day. It would be virtually the same thing. There are some pretty decent organic based, bottled nutrients now too.
If you really do want to go the indoor organic soil route, there're some great threads about it here in the organic section.
I think the main objectives are, all your amendments should ideally be fully composted, and to keep the soil microbes healthy / maintained.
Pretty cool video i saw on YouTube the other day. You might like it too.