The verb were should be bolded in this sentence. It is written in the subjunctive mood because it gives a statement that is contrary to fact. The speaker says IF I were a teacher, which shows that the speaker is not actually a teacher. The second half of the sentence is written in the conditional mood, because it is based on the condition of the speaker being a teacher. Imperative mood verbs are used in commands. Indicative verbs are used in statements of fact. Interrogative mood verbs are used in questions.
Its a simple run on sentence, because there are two independent clauses, and it can be broken into two different sentences. I will receive my diploma in May. Then, I want to look for jobs.