Freedom, the wonderland for each artist's creativeness, can result in appearance of masterpieces in music, art and cinema, so on.
Freedom, the wonderland for each artist's creativeness, can result in (
the ) appearance of masterpieces in
music, art , cinema and so forth .
shouldn't--->should not (It would be better to avoid abbreviation in IELTS writing)
Beside good content compositions, some poor quality ones with meaningless lyrics or vulgar words released can have bad influence on the community.
Beside good content compositions, it would have undesirable influence on the community, if some poor quality ones released meaningless lyrics or vulgar words.
I suggest you can use some advanced adjectives to replace "good" and "bad".
I hope it can help you.