/diy/ - Do It Yourself

I'm building a scale model and will try lighting for the first time
I've been researching how to build a simple LED chaser circuit. There would be twelve leds that would blink in series over and over. but as you can see, it's very very small (each opening is less than 2mm.
Do any of you have advice on how to approach this? I've never built a circuit before, only done electronics repair and component replacing, should I get a breadboard?