HraTaika, it sounds like you're getting the hang of the controls, without looking over your shoulder it's difficult to tell you exactly what to do but you seem to be figuring it out!
32x32, so you're using a large map? Yeah, I definitely wouldn't let one of those run for long before interrupting it and checking it out, I'd probably stop it after a few seconds just scroll around and see how it looks.
With the rivers, I assume you mean you don't want so many big wide rivers? As far as I know (and we're getting into 'here be dragons' territory), big rivers are from lots of little rivers running together. The is a parameter for erosion count which is how many times it runs through an erosion cycle. I don't know if this affects how deep chasms are or if it just erodes surfaces but I heard that if you leave it on too long you get a big smooth world which causes more big rivers to form. So you could try turning erosion down but it's a pain to test to see if that's actually helping.
I guess it may be a factor you get with valleys, big valleys mean there is one obvious place for the river to run to, all the rivers converge in the valley bottoms and try to find a way to a lake or sea. What you could try is turning up the elevation X and Y variance to something like 1200 each. This should make the high elevation areas more detailed and less monolithic which might stop the rivers from converging into a few obvious places. Otherwise maybe turn the number of rivers down (there are 2 settings, I keep them both the same), there should still be rivers but they hopefully wont add up so quickly into large rivers. Or I don't know if you took my advice about turning up the minimum elevation but you could turn it down a touch to 80 or so which will let some inland seas form and be an end point for some rivers?
They're just educated guesses but I hope I gave you some ideas.