You're missing a trick, there, with large ships especially.
Maybe I'm just "gaming" the AI but I always fit a turret top and bottom on a large ship (usually small turrets, to avoid "wasting" much DPS, with some kind of long-range mod) so that I've
always got something firing on an NPC.
Thing is, the NPCs have attack patterns and they'll break off and go defensive if they get shot at.
If you've got a turret that can
always put fire on a target they'll break off their attacks and go into "look for a safe position to mount another attack" mode instead.
As a result of this, you'll end up in far fewer "jousting matches" because the attacker will break off as soon as the turret starts laying fire on them.
Also, on ships like the Anaconda and Corvette, a pair of turreted frag-cannons mounted pectorally can provide a 360° field of fire and
really punish any ships (I'm looking at you fed' ships) that attempt to get too close.
As a bonus, due to the short range of FCs, you can leave turreted FCs enabled in the knowledge that they're unlikely to cause problems with friendly fire.
On the subject of fixed weapons, I don't think it's as much about learning to aim the weapons as it is about learning to fly the ship.
Pick something like a Python or a Keelback, with modest agility, and it'll be a lot easier to get used to fixed weapons than it would be on something like a Vulture or Viper because the ship isn't as twitchy.
Sure, you won't be able to out-turn your targets but it'll be easier to hit 'em when you
do get 'em in your crosshairs.
Once you're comfortable tracking targets in a forgiving ship, then give it a try with a more agile one.
I put a small fixed MC in my 850m/sec+ Viper and I doubt
anybody would be much use with it 'cos the ship is simply too twitchy.
On that, I have to set 0 pips to engines just to make it controllable enough to get through the mailslot and land.
Bung a gimballed MC on it and at least I can actually irritate other ships with it by hitting them.
If I
do ever reach a point where I can track targets accurately in the Viper, I guess I'll know I'm done learning how to use fixed weapons.