There is no posting limitation here. No matter how much you post here, you will not get any improvement and your rank will not increase until you get merit. And there is a requirement of activity here where the activity automatically increases after a certain time depending on your posts. So if you only want to post then you will not get any limitation here you can post unlimited valid posts without spamming. Where there will be completely your own writing there will be no AI or plagiarism problem. but remember ony huge post can't improve your quality and can't increase your profile rank. so make less post but make it qualityfull
A forum member can improve by reading more, learning more, and posting less especially as newbies. I don't say all newbies are unknowledgeable but if they truly are, they must avoid posting as their main priority must be reading and learning.
Without knowledge, they can not help, and if they try to help, it's more like shitpost and spam, not helpful at all. It is even annoying with other forum members who have to read low quality posts. They can ignore such newbies and it only reduce the chances of receiving merit from readers of your post.
If you make ten thousand posts in a week, your activity will be capped and you will still be a Newbie. If you make ten thousand useless posts over any period of time, you will gain zero merit and you will still be a Newbie. You can rank up only by making good posts consistently. It's quality over quantity.
When trying to write quality posts, a lot of people act as though they're writing a book report for school: putting facts that we already know into their own words. Nobody wants to read that, and you will not get merit for it. Moreover, the length of your post and the quality of your English are only minor factors. In trying to write a quality post worthy of merit, you should offer new ideas, personal experiences, or perspectives that other forum users will actually find new and interesting.