You would post your work in the resource submission section. You should also check out the rules there. There doesn't appear to be any restrictions on what you can post, as long as they were made by you.
However, you can't post or take credit for resources made by other people, which leads me to ask about number 2, since you stated "not to take credit". Did you make these? If so, I don't see it being a problem, as long as you credit the original designers. But if you didn't make them, even if you were planning to offer credit to those who did, I would probably avoid posting them. Instead, you could encourage the original author to post their work here, but leave it up to them to decide for themselves.