As for me, the only question I have is whether or not humanity is the only race available for player characters in the RP.
Ah, yes, I should specify that.
The answer is... yes and no?
The people of Cadwall have an appearance similar to elves, because they've been living with nature for so long, their outward appearance has been altered slightly by magic.
The people of western Loyn (Rhos, if you will), are generally taller and more... refined looking?
Silver Islanders are pale, with lighter hair and eyes.
The people of Esilott were like a foot taller than other humans.
And, of course, there are "half-elves", I guess, mixes between the variations.
Think of it like the Elder Scrolls- all elves are Mer.
In Lost Lands, there are different types of humans, but they're all human.