I am new to Upwork, but i have made some "demo" jobs as the client requested in the details, and i have made a lot of proposals, but nobody answered me yet... Is it just because im new, and i don't have a single hour of working time on my profile, so they don't even bother answering me, or I'm doing something wrong?
Your profile says, "I am extremely good at both grammar and ortography."
This is a definition of ORTHOGRAPHY (not ortography): The conventional spelling system of a language.
You also have a below average English spelling test score. Don't show that score. Try taking a Hungarian translation test if they have one, and put some examples of your work in a portfolio; you can use some of the free demos you did already.
"No good deed goes unpunished." -- Clare Boothe Luce
Peter, you seem like a nice person, but there is no way you will get hired by a real client because your profile page has so many problems. You are offering to translate Hungarian to English, but your brief overview text is filled with spelling, grammar, punctuation, capitalization and word usage errors. You did not even spell "English" correctly.
You need to either forget about this whole Upwork thing or intensely study the profiles of successful freelancers and figure out how your profile differs drastically from theirs.