Overall it's good, although not quite "natural". I would say: I think nowadays learning English is very important in business. It is the best way to advance professionally because how you communicate and interact with others can make you stand out in the market. English writing and speaking skills are very important in all kinds of jobs and I am sure that my studies will help me to improve in those areas. Your last sentence didn't really seem to fit with what you had written, and I would phrase it like this: If I don't get the job in Poland, I will apply for a position in Germany.

I think studying English is very important in business these days. It is the best way to distinguish yourself because how you communicate and interact with others can help you stand out in the market. English writing and speaking skills are vary important for many jobs, and I am sure that my studies will help me to improve my skills. If I don't get the job in Poland, I will apply in Germany.

If you don't mind improve my spoken English with you,I'm looking at friends who can teach from them skype : shabokshy_2008