Welcome to the Club! We're all big enablers - oh, I mean, we're all very helpful, and love to share information.
First, you must post pictures. That's the rule.
Next, your goat is a herd animal, and she will be absolutely miserable without a goat buddy. Of course, you can be her goat buddy, but you will get NOTHING done around the farm, as she will want you there 24/7.
I'm not sure about what to feed meat goats, but my dairy goats get good alfalfa hay when I can get it, otherwise, good mixed hay and free choice alfalfa pellets. In milk or pregnant does get concentrates (mix of grains). Each of us has our own preferred mix of grains, and you will find many threads on that in this forum. My gals get oats, BOSS (Black Oil Sunflower Seed), beet shred, a little corn or sweet feed. But that's only a pound or so a day. The main feed for all goats is the hay and alfalfa pellets.
Also have plenty of fresh water available at all times, free choice loose cattle minerals and baking soda. If your area is deficient in selenium and/or copper, you will need to supplement for that.
Worm her when she kids. May as well take a stool sample to the vet to see what sort of worms she has (or not). No sense in unnecessarily worming her. If you plan to use a dewormer off-label, check in with the folks here. Most vets really haven't had much education or experience in goats, and it helps to talk with folks who've been in the trenches, as it were, to get accurate info.
When is your doe due?
Fiascofarm.com has GREAT information on kidding. Take it all (even what we tell you) with a grain of salt and common sense, of course.
But not the part about getting another goat for her. She'll be lonely and miserable all by herself.
