A majority of sites that class themselves as advanced required at least 3 paragraphs per post or a word count. From your posts here the reason they likely consider you not within those perimeters and are not willing to teach you or help you is due to the fact it sounds like your a Non-English speaker primarily. While it sucks that they're being to be blunt jerks about it, there is nothing we can really do about it you're best off going to a forum directory which you can Google and find plenty of and then searching within it for roleplays that do not have word counts and fit the genre you wish to roleplay.
I've run a Harry Potter Roleplay and admined on two of the largest Harry Potter roleplays out there and will be honest if you come on the site not knowing the genre or the fandom and the words within it that will get you a lot of flack as well. So just find something you know and enjoy and hunt out a site that advertises itself as welcoming to new members or new roleplayers and has no word counts or paragraph restrictions when posting and you'll be fine.
These are a few good resource sites that have directories you can search through for forums you might be interested in:RPG-ResourcesCaution 2.0Candyland Couture