I am a masters student at University of Bonn. My program is entirely in English. I will try to explain you difficult concepts with ease by introducing books which are easy to understand. I am adaptable and we can change the teaching style to whatever suits your taste.
I am sure that if you spend some time reading, writing and listening to people speak in english you'd be able to learn english. I usually recommend Wren n Martin which is the standard textbook for English Grammar to understand the basics.
Yes, it is easy to learn English in Cologne as it is a metropolitan city.
Yes, it is quite easy to learn English if you understand the grammar.
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