Since you have a small apartment and limited window access, something else you may want to consider, since I assume these flowers will not represent your ONLY challenge in learning to use that D7000.
If you already HAVE a separate flash unit, great, learn to use it. But I'm assuming, since you just have the kit lens, that you also don't have a flash.
While I DO have a lot of windows in my house, I also have a lot of clutter. And by a lot, I mean...well, never mind what I mean. A LOT of clutter.
Here's what I did, as a low-budget option to have a place to set up some practice shots. I bought one of those foamcore science-fair display boards, the tri-fold ones that will fold out and stand up on their own. I also bought some white poster board, and a cheap black sheet. Lay the white poster board on a table or other flat surface--preferably by one of the available windows, but if that's not possible, at least somewhere reasonably well lit. Set the tri-fold display up on top of the white poster board and you now have a cheap, small "portrait studio" with a white background. If the subject calls for it, you can simply drape the black sheet (after ironing it well) over the display board so that it covers both the display board and the poster board on the table.
While it definitely lacks 'pro' potential, I've found this to be a fairly effective, CHEAP way to shoot smaller objects without the distracting backgrounds, and it's especially useful when I am just trying to practice something...depth of field, or lighting options, for instance.