請幫我譯下呢句既英文丫~~~

I have learnt psychological counseling and I worked as a volunteer every summer.

我曾經學過心理輔導和我每逢暑假都去做義工

I once studied psychological consultation and I did voluntary labour every summer vacation

I once study psychology counselling and I was the voluntary worker on the summer vacation

I studied psychology counselling and I was used to be a volunteer on the summer vacation.