As someone with a recent diagnosis, firstly don't panic. These days it can be a very manageable disease and there is a much bigger, more effective range of treatments available than previously.
Not Googling is wise, but use reputable websites. MS Trust and MS Society are two good ones. At your next appointment she will probably be told which DMT/DMDs (Disease Modifying Treatments/Drugs) she is eligible for. What surprised me is that MS patients are given a lot of autonomy in choosing their own treatment. The MS Society has a good decision making tool about which to choose. It is worthwhile her familiaring herself about possible treatments. All have potential for side effects, but equally some people get none (I count myself lucky, I'm on dimethyl fumarate aka Tecfidera, which I tolerate very well).
She should be assigned an MS nurse who will be her first port of call to organise medication (it's a whole new ball game as the meds come via courier if choosing home administered treatments) and to go to for support with new symptoms etc. She should make use of any support offered.
It's a very frightening place to be at the moment but she will move towards acceptance given time. Acknowledge it's scary and not a diagnosis anyone would want but it is manageable, I've learnt a lot about 'toxic positivity' recently!
One very personal decision is how/when to tell friends and employers. Personally I told anyone who would listen, but everyone is different.
Another consideration is that from point of diagnosis anyone with MS is considered disabled under the Equality Act 2010. This opens up a whole range of rights and considerations in the work place.
Happy to answer any questions. PM me if you wish. It was so helpful for me in the early days to communicate with others with MS.
Best of luck.