Today I feel depressed.... (<-- multiple periods are not good)

A few days ago I was find found a part-time job.It was an automotive surveyor role and I needed to go for the job interview. It was about the work of automotive survey.And I needed to make an appointment to access. [1]

*1- Never start a sentence with the word "And"

At the beginning[2], everything the interview was going smoothly. But the questionnaire carried out to the middle of the time, his boss broke into the meeting,then interrupted our talking, he hastened back to work. [3] Then the boss barged into the meeting room and interrupted my interview, taking the interviewer with him.

*2 - Not wrong, but better to say "At first"

*3 - You don't need to say middle because you already said it was going smoothly in the beginning. So anything disruptions would be somewhere in the middle if not the end.

Then I probably left half of the problem did not ask him I still had some unanswered questions and I begged his boss to give me some time, but she not only refused my request,but also threatened to hurt me.So I had to leave right now away. [4] At that time, I did not feel unhappy, I think thought of it as a good learning experience. After all, it is not easy to make money.

 *4 - Your article is written in the past tense, so keep all all tenses past. But for the last sentence I kept it as present tense because it was not easy to make money and it still isn't easy. =)

However,What I did not completed caused a lot of trouble, I have to spend a lot of time to resolve it.

"I'm confused here. Did you get the job ? Who were you talking to in the room ? I'm sure it wasn't a customer because he had to get back to work."

NOW Now,I would also like to think about it . if I should I spend so much energy to do part-time work, or in the focus on my freshman year, when it is a good time to where I can learn more. 

It is a big problem to me now...╮(╯▽╰)╭

 I tried my best to understand what you were trying to write, but I still think I might have understood some bits wrong. 要是理解错了，请多多原谅！