Do I have to use a round hair brush and other questions?

When you go to the salon, they use a round brush and pull your hair downward to reduce frizz..its easy to do wit time and practice on yourself but yeah its a pain at first lol..if not desiring a nicer finish then by all means simply brush ur hair and blowdry. I use a heatsafe spray with keratin in it which was 20bucks from a salon it helps hair from getting fried during styling.