Sheeting inside or outside usually depends on the location of the jib/genoa tracks, the deck plan, and the sail itself.
The OP's picture looks like a situation that, with added tracks inboard, the working jib could possibly be sheeted inside. Any overlapping sail, of course, goes outside.
Chipdance: From your description it sounds like you are missing a step. The sheet should not go directly to your clutches/cleats, but through at least a padeye or a block on the cabin top or deck first.
From the pics in this link:
Gallery :: Venture 25
It looks like there's a short track and block on the coaming leading to a winch, and any cabintop cleats/clutches look to be for halyards run aft.
Though the boat is apart, these pictures may be helpful to you.