The key word is, "research." Trust me, it'll pay off in the end. Use websites or books to help you research. Writing notes also helps.
Number 1 on part II was correct before you put the comma in. Number 6 should be "The clubhouse door would not open, so the player was soaking wet."
Because it makes it easier for the person who is interested in hiring you to read, and you'll more likely be hired with a neat understandable letter.