Thank you, DevilEyes, for your opinion and for the corrections
I appreciate them
Some typos are there in spite of my checking and re-cheking. After reading it some many times I just don't see them any more. Some I noticed after posting, but was unable to edit posts any more, as someone else posted after me. Grammar checker helps me, it would be much worse if I wouldn't follow it's suggestions
your use of the Present Participle/Gerund instead of Infinitive in some places...
Yes, this is something I really don't have instinct of using. Usually it's a lucky draw and lots of hope I chose the correct form
The/a are also things alien to me. There isn't anything like that in my language.