Hi,
I would like to ask for correcting given text and putting some comments about structure etc.
Thanks in advance

Michal
Have you ever had confusing situation?What do you think about this? The W[w]
orld around us is not a perfect. Some situation when we are really mixed up, earlier or later come up. [this sentence is unclear - I think you mean to say sooner or later, situations in which we are really mixed up will occur] Often, confusing situation[s] appear[arise]
because of misunderstanding[s] or [a] lack of needed[necessary]
information. This happens not only because of malice, but mostly [due to] bad communication. I experienced [a] confusing situation. It was during the study[this is unclear - do you mean during school?]. We had to choose one of many additional subject[s] [in which] to enroll. We had [a] points system, and we had to choose as many subject[s] [needed] to reach [the] prescribed amount of points. Each subject had it own place[enrollment]
limit, so everyone rushed to enroll. I was taking into consideration[considering]
mainly English language course[s]. I was really happy and contented after I managed to enroll [in]my chosen course. Unfortunately my happiness was not taking long [long lasting]
, because I found out we shouldn't enroll to[in a]
subject which we chose[taken]
during the previous semester. I had to change [my] subject, [new sentence]unwillingly[,] I moved[switched]
to [a]German language course. I was a little bit upset and [felt] disorganized. Then it turned out [that] we could continue the same subject in the next semester, and [that] the previous information was incorrect. I was really angry and confused, everything was unclear. Hopefully[Thankfully, fortunately, luckily - hopefully is for something you hope to do in the future, not something you already did]
in the end I managed to change back to [an] English course. [This[ Whole situation cost me lots of nervous[stress]
and time which I wasted[wasted time]
. If the right information was[had been]
given in the beginning there was no[would not have been]
any problems and misunderstandings.