Managing money is really hard especially to people like me that wants to buy anything that I want. When i had my first bitcoin i bought a phone. I changed it first to real money and bought it. And i think why didnt I invested it. Then i had an everyday facepalm everytime I remember that
Regrets are always at the end, you'll never realize it unless you've already did it. That's not mismanagement I think. But since you already realize what happened to you, then I think you already learned the lesson. I am sure that you will be good at managing your money in the future. Just don't repeat the same mistake over and over again.