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I find a lot of this difficult to follow; I find more often than not when I use a more specific tag, particularly one that's not been used yet, it often won't allow me to submit the post until I remove it and stick to one of the more conventional tags. And only five tags? I come from other platforms that allow for many more than five, even though I normally only use around three to five. Plus, I have the added disadvantage of not being able to include pictures and what not all the time, unless I've got a sighted person looking over my shoulder. Hence, I'm having even more issues reaching the top.

The first tag has to be a 'known' tag off the list. For the other 4 you can use what ever you wish. It's about how your post is filed for the system,

I've noticed that sometimes even when I use an official tag, I still can't post until I clear the others.