How to apply for a personal tourist visa?

You must get a passport before you can get a visa, because you need a passport number to get a visa.

Generally speaking, if there is no immigration tendency and illegal entry, the visa will not be refused. In some countries, the review is very strict.

I don't know the travel agency. Generally speaking, it is best to find a travel agency to go to European countries. Individual visas are easily refused. It should be easier for individuals in Korea. You can check the visa application documents on the website of the Korean Embassy in China.

Don't worry about your poor English when flying. If you are really afraid of buying international air tickets from domestic airlines, you can speak Chinese, because the stewardesses are all from China.

I hope I can help you.