Hello, Chinese names are translated into English, and the pronunciation should be the same as Chinese.

English name translation of "Gao";

High, (separated by commas between last name and first name)

Generally speaking, in English, the first name is used before the surname Gao:

Gao (you don't need to write your name with a comma first)

If you want to choose another English name with homonym, you can consider:

Sharon, Shannon, Cher, Cher, Sheryl, Cheryl, Sharon, Charlene.

Because foreigners' pinyin pronunciation is different from ours, some people will pronounce it slightly differently or even inaccurately, but this does not affect your self-introduction. You don't need to cater to their pronunciation to introduce your name.