Is my french correct? i forgot.

pour aller meiux, je voudrais nager, dessiner et faire plus de ski nautique.> to get better i would swim draw and water ski more

is the sentence at least suitable?

je fais ces parce qu’ils sont amusants.

im thinking this sentence isnt correct, but can i still have it reviewed, and if it is incorrect, can you me reform it?

how can i say "i do them just for fun" maybe "je fais ces pour s'aumser."?
what do we call the s' preceding amuser? reflexive article? no?

1. la rentrée is the first day back to school in the fall.
false (la rentrée is the first day back to school in summer)
la rentrée est le 3 septembre c'est encore l'été, l'automne est le 22 septembre)

2. in france, students take an exam at the end of their high school education. if they pass it, they can go to the university.
true

3. le bac is the test that is taken every year at the end of the year.
false
(en fin de terminale, les lycéens passent le baccalauréat)

4. french teenagers do not generally get part-time jobs because their homework keeps them plenty busy.
false

5 teenagers cannot drive in france until they are 18-years-old.
true
(conduite accompagnée : 15 ans)

6. the homes in france are generally made of different materials than most homes in the united states.
true