Cover letter for a job

I'm Tizio, I'm writing this letter because I think I'm the right person for you. Since I was a child my dream was to become an employer for an international institution. In throughout my life I made a lot of jobs in different areas but now, that i i'm graduated in european and transnational law, I'd like to follow my real ambitions.

I'm Tizio[.]<,> [I]<i>'m writing this letter because [I] <i> think [I]<i>'m the right person for you. Since i was a child[,]*1 my dream [has been]<is> to become an employer for an i[n]ternational ins[t]itution. [Over the course of] <In> my life[,] *1 [I have worked]<i made> a lot of jobs in different areas[,] *2 b<t>u[t] now<,> that <i> [I've]<i'm> gradu[a]<e>ted [with a]<in> [degree in European]<european> and [International]<transnational> [L]<l>aw, [I]<i>'d like to follow my real [dream]<ambitions>.

*1 Use commas after introductory a) clauses, b) phrases, or c) words that come before the main clause. [https://owl.english.purdue.edu/owl/resource/607/02/]

*2 Use commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet. [https://owl.english.purdue.edu/owl/resource/607/02/]