I would like to know if the following sentences are correct, i.e. do we need any commas here?- If you see a way to improve their structure, please let me know.

**I would like to gain insight into his work he did together with my sister on air pollution.**

Regarding this sentence, I was wondering whether there is a better word than "did" to describe a joint project work and is it correct to use no commas here?

**The study of air pollution conducted, among others, by my sister is innovative.**

Regarding this one, is the usage of the word among others correct here and do we need to put this phrase between two commas?

**So that upon taking a course on air pollution, I will be able to understand her work better.**

Regarding this one, is it okay to start a sentence like that or are there ways to express this in a nicer way (I have the felling that *so that* sounds a bit sloppy, but I don't know)

If you have any questions about this, please let me know.