So you were "gifted" a goat...
Anyway....
I hope you are aware that a) goats are not cheap to keep anymore, b) require daily looking after in any kind of weather and c) depending on this goat's history you may become your vet's best customer...
1.) Get another goat straight away. Not only are you taking her away from her mates she is also coming to be all on her own. If this is an adult, get a youngster, a goatling preferably (18 months old). If at all possible another goat from the same herd. Most goats are NOT happy with only their own kids for company, they (like humans) prefer to have "adult" conversations once in a while...
2.) Kidding - you need a proper goatshed, where you and the goat(s) can move around, she needs her individual pen if she usually shares the space with others.
3.) Goat books - the ones in your local library will be good enough, even if they were published in the 1980 - just be aware that the veterinary side has moved on. But nothing much in feeding terms has changed.
4.) British Goat Society has a lot of info on it's website and should also have info on any local-ish goat clubs.
5.) Check her feet and if overgrown get them trimmed straight away. Utube videos available on hot to do it.
6.) If she is 6 weeks or so away from kidding she will need feeding well - build it up gradually so that she has a full ration about two weeks prior to kidding. Know all about pregnancy toxaemia (google it). Be prepared to get the vet out if kidding is problematic (or have other goatkeeper there).
7.) Think now about disbudding the kid(s) (or not), also make sure you get any boys castrated early on. Just have a plan on what to do with the kids. Please don't keep any male kid intact, there are too many unwanted (and smelly) males already out there. Goat meat is delicious!
I am not trying to come over all critical and preachy... but hopefully you will keep goats for the foresee-able future. Pre-loved is full of "goats free to ANY good (?) home"...