Try not to worry about it; this is a bit like a playground and some of kids are pretty wild (and sometimes even a little nasty). We bump into the walls and each other all the time, but as long as you operate within the forum rules (and you've not even come close to violating those!), pretty much anything goes. That also means that if people are critical of things you say, or sound a little angry - try to see that as their problem, not yours. If this happens, keep in mind that they're responding to an idea, not to you as a person. You're welcome here and your presence is highly appreciated.