That's a beautiful bunny! Most bunny owners use a puppy pen or NIC grids to construct their bunnies' digs. 16x30 is a bit small, especially as Primrose grows bigger, but as long as you let her out to roam and exercise for the better part of the day, it'll do for now.
I would not introduce leafy greens as a part of daily diet till 4-5 months, though if you want you can give her a small leaf or two every now and then. I recommend a few stalks of cilantro/coriander, it's good for tummies and most every bun will go nuts for it. As she is a growing bunny, she'll need alfalfa in her diet. Are you feeding alfalfa-based pellets? The standard recommendation is that growing buns get alfalfa hay, as timothy is low in nutrients, but if you are feeding a good alfalfa pellet and you feel the bun can maintain a healthy weight on that, it's all good.
As for getting bunny to like you, just use common sense. Rabbits are instinctive prey animals and get scared of loud noises, fast movements, and people chasing and rushing to grab them like a predator would. Just try doing your own thing around Primrose a lot, being nearby in a passive way. Sitting by the cage and talking or reading calmly to her to get her used to your voice, smell and presence. If she comes to you, slowly introduce her to your hand, and offer a gentle pat. But by far the most powerful tool in your "Come Here And Love Me" arsenal will be - food bribery! This can be pellets or veggies, and very occasionally, little bits of fruit like banana, tomato or apples. Feeding your bunny by hand is a great way to bond. But how long it will take to develop that bond depends on you and your bunny. For me it took a couple weeks with one of my boys, but nearly 3 months with the other, more snubby one.
