How do I know if she is eating enough?

I am a brand new bunny owner. Her name is Lacy and she is a Holland Lop. She sits in her litter box and won't really hop around the rest of the cage and every time I take her out of the cage she pees. How do I encourage peeing in the box and not peeing on me?

Look at her droppings are they hard big, round light droppings then she eats okay.

About droppings: http://www.therabbithouse.com/diet/rabbit-droppings.asp

Let her first get used with the cage, if you force it to fast. She will be harder to litter train. Also letting her get used with you are the start, bonding and winning her trust.

She might be scared or marking her territory with peeing on you.
https://articles.extension.org/pages/33013/rabbit-behavioral-problems:-inappropriate-urination

I didn’t take out my rabbit from his area until he always used the litter box. Then I just left his cage door open and let him explore the area on his own.

But don’t let it be a all to big area or else accident might happen.

My rabbit only peed once on me but that was when strangers was picking him up and didn’t let him go as a kit. Forcing him to hold himself while they petted him/cuddled, so when I got him he relaxed and snuggled up, making my clothes wet [emoji23]

How long have you had her?

If she isn't yet comfortable to come out of her litter box and explore the rest of her cage, then it isn't advised to take her out of her cage. That's rushing her (and stressing her). Leave her be for awhile.

Give her time to get adjusted to her new home/cage.

Once she's comfortable in her whole cage and is consistently potting in her box, then her cage door can be opened so she can hop out if and when she feels ready. The area around the cage should have an ex-pen so that her space is limited. This way she can return to her cage and litter box at will.

I'll link a site when I get to my main computer, but she should not be picked up out of her cage. That will teach her to fear you. Let her take the lead as she feels ready.

How long is she with you? One of my rabbits didn't show any signs of life first day was staying in the corner and only started drinking after about 8 hours, had a little bit of food after that but there was no movement inside his cage for about two days, and when I took him out on second day evening he was very passive I thought maybe he's ill or very old (he was found on street in cardboard box and people who found him gave him to me as they have dogs, they said he also was very quiet for first day but by the end of week was much better). So when I brushed him he also peed on me, I think it was very smart move because I immediately put him back to the cage. I just left him alone for a week, just giving food and changing water twice a day and saying hello Fred every time, then I even covered his cage so he understood it is his place and slowly he became more active, now it is more than two months and he's great active rabbit, and only goes to his box, very responsible rabbit, I am very happy he's with me and he lets me everything licks my hands and neck, yesterday I clipped their nails and they liked it so after that they kinda trust you more and very relaxed and sweet.

Last night after nail clipping he was so relaxed on my lap I took a few photo of him, can you imagine that two months ago I thought he was old and dying not eating or drinking and no movements staying in his corner for a few days. I am sure yours will be fine too she just needs some time and some space

Back on my main computer...

Ok, so here's the link about potty training:
https://rabbitsindoors.weebly.com/litter-training.html

I'd suggest reading that link first. One of the titles there is...
"The next step – letting bunny out of the cage: "

When you progress to that step, that can be combined with bonding with your bunny. The section on how to bond with your bunny (you'll be sitting in that area where bunny is let out of the cage) is here:
https://rabbitsindoors.weebly.com/bonding-with-your-bunny.html