Answer:
(Simple Sentence) I would never travel back in time. (Compound Sentence) I have this decision because I am more of a future person. (Introductory Subordinate Clause) By the time I would travel back in time, several mistakes would recall, which I have overcome already, the reason why I choose to move forward and onward and learn from my mistakes and grow. I cannot move forward and achieve my goals, (Secondary Subordinate Clause) if I am stuck with my past. If I, (Embedded clause) my present self, would hold on to the history of my life, there will be no tomorrow for me. (Introductory participial or prepositional phrase) Instead, I would have focused on my long-term goals of being self-sufficient and then progressing to the next stage of life, where I would learn more about my chosen career.
I wouldn't alter anything except perhaps my decision to return. Since I have nothing to regret from my past, (secondary participial phrase) therefore, I wouldn't alter a single event or person from my life. There are many things in my life that I should set a focus on (Colon): my studies, future career, passion, and more. Moreover, I would modify how I respond to them. Not worrying about the minor stuff would be an important skill to acquire.(Semicolon) I am capable of coping with life; I have my own ways.
In life, you don't want to sweat the small stuff, but at the same time, high school (and life in general) is simply just a speck of your total existence. In our diurnal experiences, nothing should be taken for granted and we should not allow ourselves to be unhappy as a result. High school isn't always the end of the journey.
Step-by-step explanation:
I believe that all needed punctuations and phrases are being added and identified in the paragraph. If you have any questions feel free to message me in the comment section so that I could give you further details on this assignment. I did not alter much on your takeaway because I find it very well written and answered.