My work in the automotive industry

Very good.  I would like to suggest that you rewrite your third sentence in this way: 

This is very difficult and challenging for me but, at the same time, it will be a good experience.

My work in automotive industry

--> My work in the automotive industry

--> Since my company is quite small, each employee has to do many things. In my case, for example, apart from quality control-related work, I have to do many other things so that we can quality for the IATF 16949 certification in 2019.

This is so hard for me but at the same time, it's very challenging and I am aware that it will be good experience for me.

--> Although this is hard for me, it challenges me to expand my current capabilities. I'm sure that this will be a good learning experience for me in the long-run.

So, I have to keep doing what I have to do and I hope everything will finish well.

--> I'll just have to stick with it and hope that everything turns out well in the end.

ゆたさん、よくできましたね。ほとんどは間違えないんですが、一応他の言い方を書いてみました。頑張ってね！