Welcome to UK
First and foremost do register with your local doctor and dentist...follow these useful links:-
How do I register with a GP?
How to find an NHS dentist?
Here's a link to a website that you may find useful called -
Just Landed
Another similar and pretty good general website is here called
Just arrived in UK
The very best website for all issues connected with the UK Government Departments etc is
here called GOV.UK
You'll find a complete range of information and services. Very useful.
Sorry to repeat what others have said but it is important to have your name added to your husband's Council Tax Bill, and any utility bills (this will provide address ID to open bank account, applying for credt, applying for FLR etc.)
I'd also suggest you consider studying and passing the new Life in UK Test and a B1 level English Language test (you need to pass both before applying for ILR). It's always a whole lot easier to find time to study and pass during you early months while you have time free before you are granted FLR(M) and start working.(If you have any intention to seek employment)
Immediately following approval of your spouse visa FLR(M) you should apply for your National Insurance Number.
Don't get too hung up on these adding names issues.....take you time to complete each one properly.
For the FLR(M) there's no requirement to submit such proofs of you cohabiting at the same address.....that comes later with ILR. However, for your first FLR(M) you will need to submit your marriage certificate.
Always a good idea to print out
the FLR(M) form here for review from time to time just to be sure your on track and have no unexpected surprises.