EDIT: Modified the my 2nd post. Is this good? I guess so, but I don't really know if they amount of shields/armor is okay.
You have a working design. The next step is to actually use it in combat and see how it works. When you see a potentially hostile contact make sure you exit out of aurora entirely and make a copy of the database. This way if you make mistakes in controlling the ships (ie forgot to set pd up when the missiles are coming in) you can go back and fix those types of mistakes. If you want a true learning experience, fight the battle out and see what happens. Then change the designs of your ships around and refight the battle to see how that makes a difference. As an example for a reworked design you could make the turrets tripple gun turrets and use the extra space saved to up your shields, armour, or both. Then see what works for you. If you do not have a decent missile ship for both offensive and defensive purposes then you will probably want the extra defenses. I would recommend 1 ship with 10 size 1 launchers and lots of magazines. This is your primary point defense and you want it to thin out the incomming salvo's so that the lasers can take care of the rest. You will also want at least a couple of long range anti-ship missile ships (60-100 mkm is a good start). If not then hopefully you are faster than the enemy ships which is problematical given your tech levels.
Brian