I mean, i am writing some chapters, right now (well, not really, but i will) is there place in here where i can show it to forum members and get some "protection" for my work ?
Have a look in the PM you will have received from me upon joining. The information you want is to be found therein.
Once you have, IIRC, twenty posts and two weeks membership, you'll have access to The Workshop, where you can post your stuff for critique. You need to post two constructive critiques of other people's stuff for each thread you make there, but that's not too hard. Check out the Quick Start Guide