Lizzy would make a fine meal, but she is wearing all too much clothing. You didn't get full value out of the last lass, and Lizzy makes her look half naked. No, you have got to get her out of that tent. But how?

Face first seems possible. With her staring at the floor like she is, she will never have a chance to order you to stop. And once her head is swallowed, you can just strip her. She is just a little lass and you can ignore any struggles she might make. She would make a fine meal that way.
Still, there are consequences to worry about. You don't see the head girls approving your digesting Lizzy as soon as you were alone with her. She is just a lowly newbie, so maybe they would let you, but the odds seem really bad. You better figure you will have to deal with Lizzy once she gets out of your belly. And she will likely be really mad, and able to order you around in many a nasty way. You are not sure of the exact rules, but it sounds like she can order you to tie yourself to a bed naked, and then she plays whack a mole with your vitals, using a very painful hammer. Getting her mad could have serious consequences... Of course there are women who like being dominated, and Lizzy has not shown any eagerness to dominate you. Still, why would she have selected this place if she wanted the man on top? No, odds are not good.
But she would be a really nice meal right now...

Maybe talk here out of her clothing? You know a few tricks that might work. It will be more work, and less fun, but she probably won't be screaming mad once you dine on her.