YOU SAID:

when i was young i used to do stuff and it was not great

INTO JAPANESE

私は若い頃、何かをしていたのですが、それは素晴らしかったです

BACK INTO ENGLISH

I was doing something when I was young and it was great

INTO JAPANESE

私は若い頃に何かをしていて、それは素晴らしかったです

BACK INTO ENGLISH

I was doing something when I was young and it was great