Couldn't introduce myself in a job interview

Couldn't introduce myself in a job interview I just turned 18 and submitted my CV to a job search website in my country. To be honest I shouldn't have ventured myself into things like call center operator and english teacher if I can't speak, plain and simple. I spent an entire day trying to think of what to actually write down on my CV and it's funny and sad that I clung to the idea of getting away with being myself (which means clueless dude) when I know the last thing employers want to have to deal with is people that stutter and brain freeze every 5 seconds. Anyway I was somehow selected to partake in a Zoom interview; I answered to the operator telling me said information in short-spoken fashion because I couldn't conjure up anything much more to say. I blindly agreed on taking a live english test for a call center that very same day in 30 minutes. Damn. I had never used Zoom before so I was not feeling good about myself even before the meeting started. I sat there on my chair and thought of what to say, I thought of words and sentences that were valuable and cohesive. The meeting started, the tester stated that he was just there to rank us and not to interview us for the job; he typed 2 questions in chat and told us to answer in order. So this girl that knows a quarter of the english I know was able to answer the 2 questions in 1 minute or less, then this man from Las Vegas flawlessly answers as well as one can in 2; I then get called to answer the questions thinking of how both ends of the spectrum look like. So the question was, "Can you introduce yourself?". I said, "Hello, can you see me?". I don't know why I said that apart from buying myself time, but time for what? He obviously said he could and I said "Hi, my name is (name), I am 18 years old and, I...wanted to get this job because...I know it is very imp...ortant to be in an environment of people that...they know it is very important...and...I want to have...". He interrupts me and says "Ok, that's enough thank you, you can leave". I accepted the shame and exited the meeting, felt terrible and just lay on the bed blaming everything into either lack of preparation or the fact it was my very first time doing something like this. A 5 year old would have answered correctly most likely, yet I couldn't. Granted it took me 1 minute to say all of that in small bursts with stuttering in between and I didn't answer what I was asked and instead buried myself from the get go. Fair enough, maybe next time.