Ah, from my memory, since the server is down:
Medium slots: medium armour repair, medium shield booster, medium after burner, passive shield extender
Low slots: medium hull repair, passive cargo expander
I know they're the right ones, just not sure if they're all "medium" components.
Yikes. Not a good setup at all.
Caldari ships are primarily shield tankers, so you will want to ditch the armor/hull reps. It's never a good idea to mix tank types. This includes mixing active with passive tanks (the shield booster is active, the extender is passive, always pick one to focus on).
This is a standard passive fit you should focus on training for:
[Drake, Basic Drake]
Beta Reactor Control: Shield Power Relay I
Beta Reactor Control: Shield Power Relay I
Ballistic Control System II
Ballistic Control System II
Large Shield Extender II
Large Shield Extender II
Ballistic Deflection Field II
Ballistic Deflection Field II
Heat Dissipation Field II
Heat Dissipation Field II
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
Heavy Missile Launcher II, Scourge Heavy Missile
[empty high slot]
Medium Core Defence Field Purger I
Medium Core Defence Field Purger I
Medium Core Defence Field Purger I
Hobgoblin II x5
Your shield skills to level 4 should be your first focus (shield operation, shield management, shield upgrades, tactical shield manipulation). Get to where you can fit a tech II tank and you can slug it out even in L4 missions. I wouldn't recommend that, however, because your dps will be so low that it would take you too long to finish a mission.