Hi I want to go to Thai university

Hi first I am sorry about my English.. I have learned english only 3 years.I am 17 and this years I am turning to 18 which means I bore in 2000 and learning year 10 in British school. I came to Thailand 2 years ago which was 2016. This because I have never learned about English before therefore my parents worried about I fail the gcse tests. I was planning to go to Thai university because you know.. I am quite old to stay at secondary school with young people. so I am wondering I can go to Thai university with only ICGSE because I heard people who bore in 2000 can go to Uni with only GCSE. And I also want to know what is the difference between department of performance communication and department of new media communication