Hi! I would be delighted to offer some feedback regarding your notebook entry. First of all, your meaning is clear and your command of vocabulary is very good. Let me just offer a few observations and suggestions to fine-tune the technical aspects of your writing.

A talk (or, "conversation") with myself (1)

I graduated from the faculty of commerce this year. (Note: If you state a particular faculty, you might also state the name of the university, to give it more context.) My studying was in Economics for two years. (or "I studied economics for two years.") When I was a student, I imagined that everything would be easy and that I'd find a job that I wanted after weeks from ("a few weeks after") finishing my exams. I imagined that I'd complete my studying (or "studies") and start my master's  this year. (Note: When we use "master" in this context, it should be possessive because it refers to a master's degree; in a sense, it is the degree of a person who has mastered a topic.) But (or, "Unfortunately,") when I finished my exams, I found myself searching for a temporary work because I couldn't find the job which (or "that") I wanted with an acceptable salary. (Note: If you had written "job", the indefinite article would have been correct, but with "work", we wouldn't use the indefinite article - not in this context.)  So (or "As a result,") I worked in the customer service filed (or "in the field of customer service") as a call center agent for a well-known company. This is my fourth month there, (or "I have spent four months here"), and for the last month I used to wake up       

("I have woken up" or "I have awakened") every day and convinced myself to resign (or "thinking about resigning"). Finally, I resigned (or "submitted my resignation") a week ago and I'll leave this job after ("in") 25 days.

Indeed, I don't know what I'll do after leaving it (or "this job"), but I'm sure that it was a good decision I made (or "I made a good decision"), because finally I could (or "will be able to") do what I believe, and what I believe is that I'm not a tree to be (or "remain") in my place. So if I wanted to move, I have to move. 

With regard to the last sentence, you have at least two choices:

1. Hypothetical statement: If I wanted to move, I could move.

2. Statement of fact: If I want to move, I can move.

It's easy to believe in something, but it's too (or "very") difficult to apply that (or "to translate that belief into action") because you'll lose something to win something else. //lovely!!//

Very best wishes, Ghada.