Ships & Modules

Raven and cruise missiles, or typhoon if you don't mind mixed guns

if you have already get projectile it's better to use typhoon

Raven.

Afterward you can upgrade to Navy Scorp or Navy Raven. Since you are clueless on how to use arti, I suggest Navy Scorp.

It's not IG training, it's pilot skill that's going to make a difference here.

Fly away from the rats as they approach. They will keep approaching, reducing their own transversal.

So a scorpion navy issue with 170ks ehp isn't worth it and almost all resistances to 90%?Really confused and don't know what to do or train.

I could hit rats just fine with 1200s and without the TC. Besides, don't you have drones for frigs?
I fear switching weapons won't be the solution.

Missions are about gank. Train gank skills.

I liked it better when you just said "Winmatar wins " and we didn't have to read through your posts...

If i get it right , OP is having more a "Falloff way to go" other than a traking problem
Expecially a maelstrom Vs a machariel/vargur is going to lose a lot of its dps because of "short" falloff compared to other 2 ships, anyhow still a great "easy" ship, here you have 2 way to solve this problem:
1) fit 1200 arties ( lowering traking but huge optimal and insane falloff compared to autocannos can end in appling more dps on targets if you understand how to shot at rats )
2) move to a CNR-SNI and enter the easy boring game ( no 1-shoting things ever , just boring delayed excel dps )

Hula

A little incoherent, but if I understand you right (which is not a given):

A pure-PVP-fit ship will get slaughtered in a dedicated PVP fight. I've learned that the hard way.

Maelstroms are commonly used in PVP; Ravens, not so much. You'll occasionally find a Scorpion Navy in a PVP fleet, and you'll often find standard Scorps, but missile ships have serious disadvantages in heavy fleet combat.

For PVE, missile combat does have factors in its favor, such as the elimination of falloff or poor weapon tracking as issues, and the ability to precisely tune your damage to the rats you're facing; also, cruise missile Ravens can do full damage at absurdly long ranges, and with the advent of the micro-jump drive, they can quickly stand off far enough to really take advantage of their engagement range.

There's a reason the Raven Navy Issue is a go-to mission boat, after all. Its bonuses are purely offensive, so it can weigh more towards gank on the tank/gank scale, and it doesn't require as much micromanaging as more exotic ships like the Machariel. The Scorpion Navy's tank bonuses make it a tough nut to crack, but your shields don't help you clear rats any more quickly. (People will use SNIs as mission boats if they're uncertain about their ability to stand up to hostile fire, which is a reasonable concern, but makes for less efficient mission running.)