Present Perfect

I am studying Present Perfect Tense. I wrote some sentences. Could you correct me?

1. I have been living in the USA for 7 months and I will be here until August.
2.I have just left my house.
3. I have just finished the project that I was preparing for a long time.
4. My mom told me that she has changed her job.
5. I have never been to Paris, though I have been to France many times.
6. You have been to many places in the world.
7. My sister has ridden on a horse many times.
8. I hate snow, and it has snowed over three times this week.
9. This will be the first time I have driven, so I am a little nervous.
10. I fell down the stairs, so I have had a broken leg.

Present Perfect

I am studying Present Perfect Tense. I wrote some sentences. Could you corret me?

1. I have been lived living in the USA for 7 months and I will be here until August
2.I have just left my house
3. I have just finished my project that I was preparing for long time.
4. My mom told me that she has changed her job.
5. I have never been to Paris although I have been to France many times
6. You have been to many places on in the world
7. My sister has ridden on horses many times.
8. I hate snow, it has snowed over three times this week.
9. This will be the first time I have driven so I am a little nervouse nervous.
10. I fell down from the stairs so I have had broken my leg

Present Perfect

I am studying Present Perfect Tense. I wrote some sentences. Could you correct me?

1. I have been lived living in the USA for 7 months and I will be here until (the next, or a more specific adjective) August
2.I have just left my house
3. I have just finished my project that I was have been preparing for a long time.
4. My mom told me that she has changed her job.
5. I have never been to Paris although I have been to France many times
6. You have been to many places on  in (or around) the world
7. My sister has ridden on (horse(s) many times.
(Run-on sentence) 8. I hate snow,. it It has snowed over three times this week.
9. This will be the first time I (would) have driven so I am (still) a little nervouse nervous. (The context makes it look like you have not finished driving.)

10. I fell down from stairs so I have had a broken leg