As you learn and speak more English, you will get more confident. Keep trying!

"Towards" is used together with "growth", so it would be "the growth of (something) is in this direction". It says that low skill jobs are increasing, but also that other areas are not growing, or growing less than low skill jobs. Literally,, "hollowing out" means that you take out the centre of something. For example, hollowing out a watermelon, you leave only the outer shell but not the inside. In context, it means that the middle class is getting smaller, that there is less of the middle class. You can use "towards" in many ways. For example, "she walked towards me" means someone is walking in my direction, closer to me. "She tends towards apples" means that she likes apples (more than something else, or as opposed to something else). "Towards" when not used literally, has a meaning of [this] instead of [something else].

For those two options, it does not convey the meaning of "because someone else is doing it, that's why you don't need to". There is no cause for the "not worrying" part. Depending on whether it formal or informal, you can just say "someone else is (already) doing this, please don't worry", or "someone is already working on this". They will understand it, and usually wouldn't take offense even if you say it a bit rudely.

Literally, it means "he is not afraid of the sky, nor the earth". However, in Chinese, it means that he's not afraid of heavenly retribution, or the judgement of any gods, and he's also not afraid of earthly retribution, for example laws, or people's hatred, etc. In essence, it means someone is not afraid of spiritual punishment, or physical punishment. It means that he isn't afraid of anything, but it has a sort of negative connotation. If you're trying to say "brave" as in for a hero, it might be better not to use this phrase. It conveys a kind of reckless behaviour, or something akin to provoking authority. It might also be used admiringly, perhaps by young kids looking up to their seniors for being bold.

I don't understand art. I like brightly coloured (OR vibrant) paintings (OR drawings OR pictures).

Uncle, Aunt

Why describe in English father's brother and mother's brother, Why are the father's brother and the mother's brother both called "uncle" in English, Uncle knowing they were two different people, even though they are two different people? if you told me your uncle attended will not know which of them attended, if you tell me that your uncle attended, I will not know which of them you're referring to and this also applies to the sister of the mother and sister of the father????!!!! and this also applies to the mother's sister and the father's sister.

It means that he takes credit for your work. For example when you do something good, he doesn't say that you did it. Instead, he claims that he's the one who made it happen.

in her side (no) on her side (yes) in her mind (yes) on her mind (no) in her perspective (no) The best way would be to say "from her perspective".