Hi there Pizit:
Welcome to RV America (and a whole bunch of knowledgeable folks).
You will find that there is a whole bunch of knowledge among the members of RVA, but many of them stay in the woodwork until an interesting post comes along (especially those from newbies asking about the RV life style--either a weekender, an extended timer, and even some full-timers.
However, unless you ask a question to drag the lurkers out of the dark, this forum seems rather dead.
Many of the folks have diesel pushers, some have gas rigs (from very old to fairly new), and also a lot of 5ers. We have some expert fix-it gurus on this site, so don't be afraid to ask.
Having an RV and enjoying it are always a learning experience (even for those who have "been der, done dat). All of us have made mistakes (some of them alarming and some of them humorous)--but that is all part of the learning experience.
We all know how sometimes being a newbie can be a daunting experience--full of insecurity and doubt. But, as well all have, you too will learn by doing (and from asking questions from those who have trod the path before. Don't think of any question as too dumb or too embarassing. Unless you ask, you might learn something the hard way (and sometimes that can be very expensive).
All the folks on the forum will try their best to give you the best advice that they can--but be aware that sometimes the advice from different folks is not always the same.
Welcome to the wonderful world of RVing.