Olympiad training : MIT significant challenge

Tell us about the most significant challenge you've faced or something important that didn't go according to plan. How did you manage the situation?

The lectures are hard, the tests are complicated, the friends are intimidating and the lab works were stressful because the lab was small and crowded. That was my first impression of International biology Olympiad training. It was frustrating to know that there are many people who are much better at what we thought are our strength. Still, I believed that my decision to attend the training was not wrong. I believed that if I tried, the training would become more enjoyable.

Thus I tried my best to catch up with my friend. Were the lectures hard? Then I would try to listen and ask the question if I don't understand. Were the tests complicated? Then I would try to discuss it with my friend to understand it. Were the friends intimidating? Then I would try to talk with them about themselves. Were the lab works stressful? Then I would try to sit in the corner or in the room beside the lab that's connected. After all of those, the training has become more pleasant. Sure, it was still stressful, but I have come to enjoy the training itself. Beside the enjoyment of the training, I discovered many things about my friends.

The lectures are hard, the tests are complicated, the friends are intimidating and the lab works were stressful because the lab was small and crowded.[Rewrite: hard lectures, complicated tests, intimidating "friends" (not sure if "friends" is the best word), and stressful lab work: ] That was my first impression of International biology Olympiad training. It wasis frustrating to know that there are many people who are much better than us at what we thought arewas our strength. Still, I believed that my decision to attend the trainingparticipate was not wrong. I believed that if I tried, the training would become more enjoyable.[Either expand on this sentence or omit it.]

Just some rudimentary editing above. Essay, as a whole, is underdeveloped. It seems like you jumped from introduction to conclusion without telling about the challenge other than a passing remark that it was "stressful". You didn't talk about how you worked through the challenge.

I would completely rewrite the second paragraph (hence, the reason for no editing marks); it's way too unclear for me to grasp clearly what you want to say.