Hi Bev, and welcome
Even when we expect it, a diagnosis is a major shock. The good news is that you will get used to it eventually, but do be kind to yourself in the short term - your emotions are likely to be all over the place for a while
The best way to get onto a DMD (disease modifying drug) quickly is to know what you want and ask for it rather than wait to be asked. The paperwork for funding and sorting out the logistics company etc can take 2-3 months even after you’ve made a decision, so the sooner you do, the sooner the ball starts rolling. The person who actually does all the paperwork is usually the MS nurse; hopefully yours will be touch soon, but if not, it’s worth trying to get in touch with him/her yourself and saying hello & I’ve made a decision. The best place to get good info about DMDs is the msdecisions website. There is a pretty good tool on there to help you choose between them too.
Remember that they are not a cure though and they work to different levels of effect for different people. So no guarantees
If it helps, I was diagnosed with MS in 1998 and I was still competing in martial arts 12 years later. So you never know, you may still be a Fitness Instructor for a very long time
The MS Trust and the MS Society do loads of free booklets about all aspects of MS. I don’t suggest you go mad and read everything, especially as a lot of it won’t be relevant, but maybe have a look at some of the introductory things so you can get a few answers to those questions. Most people know very little about MS and the stuff that’s portrayed on telly is usually garbage! In reality, MS isn’t exactly what any of us would wish for, but it is NOT the end of the world. Life might be different, but it can still be good.
Finally, the post-diagnosis housekeeping, just in case no one has already told you: you need to tell the DVLA that you’ve been diagnosed (they will most likely put you on a (free) three year renewable licence) and you should have a good look through all your paperwork to see if you have any policy that might have a critical health clause - MS is a payable condition.
For now, just take it one day at a time.