My plans to next summer

Recently I was in the exchange center and agreed to participate to in the programme Work and Travel. Soon I should to be able to pass an interview for level of English level. I want to find somebody to talk with them for to improve my knowledge, spend free time for fun and maybe teach Russian)

Corrections in red.  Stylistics in blue.

My Plans for Next Summer

Recently I was in the exchange center, and I agreed to participate in the Work and Travel program. Soon I'll have to pass an interview to determine my level in (variant: level of) English. [1] I want to find somebody to talk with in order to improve my knowledge, spend free time for fun, and maybe teach Russian.)

[1]  The phrase "for level of English" is not correct.  I wasn't sure what you were trying to say.  Perhaps you were trying to say, "I'll have to pass an interview to determine (определить) my level in/of English."  But if you were trying to say something else, please paraphrase in English, or write the sentence in Russian, I will try again to help.

My plans to next summer

Recently I was in the exchange center and agreed to participate to the programm Work and Travel. Soon I should to pass an interview for level of English. I want to find somebody to talk with them for improve my knowladge, spend free time for fun and maybe teach Russian)