Please correct the following.

～NATURAL HISTORY MUSEUM～

I was working part time as Kaiten Sushi while I was a student,
and my friend at that time happened to come to the UK by foreign language training of his company.
He was a two month training so he return to Japan,
but when he was still in the UK I went to NATURAL HISTORY MUSEUM together.

At the moment I entered there was a big model of a whale, it was awesome force.
There were many other exhibits and it was quality that I could not think free.

Question

Please correct the following.

～NATURAL HISTORY MUSEUM～

I was working part time as Kaiten Sushi while I was a student,
and my friend at that time happened to come to the UK by foreign language training of his company.
He was a two month training so he return to Japan,
but when he was still in the UK I went to NATURAL HISTORY MUSEUM together.

At the moment I entered there was a big model of a whale, it was awesome force.
There were many other exhibits and it was quality that I could not think free.

Owliewow · Answer

I was working part time at a conveyor belt Sushi restaurant while I was a student,
and my friend at that time happened to come to the UK because of a foreign language training he had to do for his company.
The training lasted two months, and then he had to return to Japan,
but while he was still in the UK we went to NATURAL HISTORY MUSEUM together.

The moment I entered it, I saw a big model of a whale, it was breathtaking.
There were many other exhibits and their quality was so good that I could not believe that it was free.
(正したことの何かがわからないなら説明します)