Given her continued clay court season, qualifying might be the best thing for her in this regard. 3 matches on the hard courts against people ranked significantly below her (though possible with much more hard court experience) to get her acclimated to the speed and bounce of the courts.
And if she doesn't qualify, she can just head back out onto the dirt.
The main draw alternate list is used to determine who gets to replace anyone that withdraws from the main draw.
The qualifying list just lists the qualifying entrants. As this comes out a couple of weeks after the main draw the order can be different than the alternate list.