That was a quick nap And to some degree, YES you will need to learn enough to get by... I also have a tank drive robot that I made, and while I did find an app to simply control it with, I still needed to know enough to modify the Arduino sample sketch to match my hardware and accommodate any "extras" that I wanted, (LED control, gear change, and even a "how to not let your robot take off on its own" routine).
I haven't Blynkified that robot yet, but when I do, I know I will need to understand how Blynk communicates and how to detect disconnects.
Search around this forum for the words connect, disconnect, etc. to see how others have handled the same types of issues.