Point of note: Not using a current limiting resistor WILL reduce the life of the LED. It's primarily to limit the amount of heat dissipated inside the LED. Too much and it will burn out. It can be either a gradual thing or an "instant" thing, but without the CLR, it WILL happen. Not wanting to do math is no excuse.
If you want to add electronics, I'm sorry, but you are going to have to do some brain-hurting as well. It's part of the job - like cutting yourself or super-gluing your head to your desk is part of model-making.
There are entire SITES dedicated to doing the math for you - like LEDcentre.
http://led.linear1.org/why-do-i-need-a-resistor-with-an-led/.
This site even tells you HOW
TO WIRE
IT UP, what power source for the number of LEDs, etc. Doesn't really get much easier. No need for tables and formulae and stuff. The only brain hurt required is figuring out how to find the page. I used google.
I got tired of cinema-verite youtube videos before they were popular. If you are going to do videos on how-to-light up stuff, then use a tripod. Seriously. Yes, I know you're not a pro at this stuff. Amateurs use tripods, too. It lets you use BOTH hands to do stuff, instead of just one.
Congratulations on lighting up your first model, though.
The job looks good - and this should be the main reason you do something.