Thank you for all your comments. One thing is for sure: so far I am learning that Czech people are rather pessimistic and discouraging... I am fully aware of the difficulties that ANY non-native language (not just Czech...) may pose to foreign learners, but this does not mean that some significant results cannot be achieved anyway. I am also fully aware of what I am doing: I am a linguist and a philologist. It is my job at university. In the past, I have already researched on some Old Slavonic manuscripts, which are extremely fascinating, let alone important for the general European culture.
Again, every language has complexity. Yes, Czech may be rather dense in its morphology (i.e., it has declensions, cases, three genders, etc.), but this is not as complicated as it seems - I have studied Latin and Ancient Greek in gymnasium. Perhaps, it is true that Czech is particularly difficult and 'misleading' in its semantics (the 'meaning', as it was written above), but it is indeed this aspect that fascinates me for scientific and reserach purposes.
So, let's try to be constructive: if you can suggest a good grammar book or an institution where I can attend Czech classes here in Manchester, that would be greatly appreciated.
You should be proud of your country, which is fantastic (yes, ok, with many problems as well), which has a great history. And you should be happy that someone is interested in your culture - rather than just discourage him.
For now: ahoj!