我会说一点汉语

你好！你好吗？我最喜欢学习语。我也喜欢功夫。我有两个妹妹和两只狗。他们很可爱，也是很凶！

1. 你好！你好吗？ they refer to the same thing, so you don't need to use them twice :)

2. 他们很可爱 this sentence is pretty good, you can regard 很 as "be", yeah, it doesn't literarelly mean "be", but as a beginner you can treat it like one, when you need to use the word "也", the word behind it is usually in accordance with the word ahead of it

Good luck, nice work you've done!

我会说一点汉语

大家好，我最喜欢学习汉语，同时，我也喜欢功夫。我有两个妹妹和两只狗，它们很可爱，但也很凶！

我会说一点汉语

你好！你好吗？我最喜欢学习语。我也喜欢功夫。我有两个妹妹和两只狗。他们很可爱，也是很凶！

嗨！你好吗？我最喜欢学（习）汉语了。我也喜欢功夫。我有两个妹妹。我还有两只狗，它们很可爱，但也很凶！