You are in a classic situation of trying to fly something you largely are not ready for. And then you went the extra mile buying the Navy version of the ship in the hopes of offsetting your lack of skills.

That being said there are several things to keep in mind, which hold true even after you have mastered the skills.

1. Your mission ship does not need to be cap stable. You shouldn't be running your shield booster full time, and if you need to you REALLY aren't ready to fly the ship. You should only need to pulse the booster, a bit more in the beginning until you thin the mission pocket.
2. with fewer cap mods you can fit more DPS mods, and especially target painters. Which you desperately need in a missile boat to hit the smaller stuff for anything useful.

If you aren't comfortable trying to change your fit, you should consider going back to a regular Raven so you don't risk such an expensive ship.

T2 light drones. Ignore anything and everything else and get to T2 light drones asap.

you are overtanked and over capacitored

you run missions for caldari navy so lets presume you fight gurista a lot

highs- arbalest cruise x 8 is the best you can get in terms of t1. make sure you use scourge missiles as guristas are weak to kinetic damage. t2 cruise gives you fury and precision cruise missiles which are fantastic. make sure that all missile support skills are to at least 4, they will help you apply more damage

mids- guristas deal kin/ therm damage so you want a t2 kin and therm shield hardener. you can add a shield extender or invuln field 2 dpending on your preference. a shield booster large or xl

with the 3 remaining mids i like to increase my damage application so a target painter, missile guidance computer with precision script and a sensor booster- no script, increased lock speed and range and sensor strength against pesky gurista jams

lows- damage control 2, 3 x ballistic control units and a power diagnostic. increases resists, damage, shield and cap regen

rigs- 2x rigor catalyst- helps apply damage and 1x kinetic screen enforcer for added resists

drones- hornets and vespas

with this and good skills, i can 1-shot frigs, destroyers, cruisers and battlecruisers over 100km away

when fighting other enemies, change your shield resists, missile and drone types

you will be blasting through missions soon enough

He probably has something like a single T2-Damage Control and in his mind this makes it "mostly T2-fit".