You are probably trying to cast your bait caster like a spinning rod. Don't expect to cast the same lightweight spinning lures you were accustomed to using. And your rod seems a bit short for best casting of light lures/baits. If you are unfamiliar, have a pro setup the reel. It wouldn't cost much to try a spool of same weight mono, to eliminate the braid being at fault.
A conventional casting reel has to overcome the inertia of the spool full of line. One trick is to nudge the spool forward, using a flick of your thumb, at just the right moment in your cast. This way the light lure does not have to overcome the spool's inertia, to start.
