I was reading the following introduce yourself text while the usage of could cought my attention:
My name is John. I'm from Russia. My family lives there, in a small city in the south, almost in the border with China. I lived part of my life there and part in italy. And I came to China this year to study in Peking University, where I'm doing Master in Engineering. Here in China I still didn't traveled so much but I visited some famous places in Beijing. I was in the Great Wall, in the Temple of Heaven and also visited Forbiden City. I'm learning Chinese here and it will be great if I could teach English also.
In the last phrase, shouldn't be better to use "can" instead of "could"?