You did just fine with your intro post. Welcome! *waves* There aren't any particular guidelines for intro posts, people can do them or not, it's all good. :-)

There are a bunch of us here who write and read high fantasy.

Congrats on the 17k! Yes, the indecision is normal. Sometimes you just have to press through it to see what sticks and then learn that the things that don't work can be fixed later if necessary.