Look into Arduino Nano, breadboard, and DuPont Cables being sure to note 2 different ends, 3 different types.If you want to have fun get a WS2811 50 12mm bulb RGB led string and a switching power supply good for at least 4A of 5V. There are libraries for these, sending data to the led MCUs takes tricky timing and they handle that.It takes 1 IO pin to change any to all of those leds, the data is serial. You send for each 1 byte of red, green, blue by filling an array with the FastLed library.You can cut the wires between the bulbs and splice them. You can make shorter strings like 10 bulbs, they still work and for full power takes 60mA per bulb. A 5V 1A PS could run an Arduino and 10 bulbs at full bright. Lit wreath?