Unfortunately it is not nearly as easy as with the Arduino/ESP type boards. Much higher learning curve as there are currently two ways of running Blynk on the RPi; NODE and wiringPi. Both work, sorta, but have limited operational documentation and examples. I would say that fairly solid experience with Java and/or C++ running in a Linux shell (my best way of explaining it) is a must to figure out the rest.
It pains me to see my RPi and other linux boards set aside due my limited knowledge on how to use them... but yes, an ESP board seems to be the way to go right now.
Here is a link of some ZeRGBa code I worked out for running both external and widget RGB LEDs You might be able to port it over to RPi running wiringPi??