I need an English certificate because I want to followtake the Communication & Information Sciences premaster's programme at Tilburg University, and the working language of this programme is English.

"follow" isn't really used for academic courses, "take" or "attend" are more usual verbs.

So far, I have only followed study programmetaken exams in Dutch, so I have no clue if my English is good enough to pass the IELTS exam.

"study programs" sounds more like a study plan.

"programme" vs "program" was a British English vs American English distinction, but I think even most British English speakers use "program" these days.

That's why I want to practice as much as possible during the upcoming weeks.

GreetingsNice to meet you, Eline

Grammatically, it's fine, but it's a little weird to sign off with "greetings", which is usually something you open with.

I'm Eline, and I'm new to this platform.

I want to test and improve my English, sSince I have to take an IELTS exam, I want to improve my English.

I need an English certificate because I want to followdo the Communication & Information Sciences premaster's programme at Tilburg University, and t. The working language of this programme is English.

That's why I want to practice as much as possible these upcoming weeks.

Greetings, ¶
Eline

I want to test and improve my English, since I have to take anthe IELTS exam.

When referencing the name of a certain/specific test or exam, we'd tend to use "the" instead of "a/an." For example, in the US, every person who wants to go to medical school has to take the MCAT, and every person who wants to be a lawyer has to pass the bar exam. But if the test in question is very general, e.g., a biology exam.

GreetingThanks, ¶
Eline

"Greetings" is only used for introductions/saying hello. To sign off, saying "thanks" is pretty typical, as is "cheers"