It's when I get start my job. = It's when I start my job.

Thanks for this experience, I can be a sociable person. = Thanks for this experience, I have become a sociable person.

Well done for this, Joy! But it's not necessary to put "get" on the first sentence. Also on the second one, it should be "have become" to make it look like it has helped you in becoming a more sociable person.