How do I keep being reasonably 'delulu' on a permanent basis in my career path?

Anonymous

I am a master's student who moved abroad and finished an undergraduate at a highly ranked university. I've doubted myself much throughout my degree because I didn't have the proper qualifications and skills for my degree, but only the highschool exams from my "third world country". I excelled academically in my home country, so I was still accepted. After two years of little achievements and some failures, with classroom stage fright, I decided it was not for me and I applied for a master's in a different field at a less prestigious university. I was accepted based on an decent GPA. I knew it was manageable, so I didn't put much pressure on myself with marks. My bigger goal was to overcome classroom stage fright so I started seeing myself as some sort of orator or charismatic public figure. I was praised by my colleagues for my skills and they told me I should become a lecturer. After seeing that I'm doing better than the admission expectations, I started going the extra mile with studying because I thought I could best my final exams and my dissertation so that I could get a much higher GPA despite not having to. It was very unlikely, but I told myself I was able to do anything and that I was destined for success and glory and that I have a great purpose in this world, so I have to best these exams before, no matter what... and I accomplished it and I was praised for my dissertation.

I've been studying this new subject for a month. No previous experience. Classroom stage fright again. Yet I volunteered to do a presentation at a lecture. I put on the attitude of a charismatic public speaker. It went great. My colleagues said I was like a great orator. The prof praised me. Next class I was anxious and I was sweating when I was speaking. He told me after the class that I could speak in an international conference. I freaked out. The deadline for an article proposal is in two days. The other speakers are profs and PhD students. I have no experience. Delulu again? How?

How do I keep being reasonably 'delulu' on a permanent basis in my career path?
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