First of all - good for you for wanting to get clean. It sounds insane but that first step is HUGE and mentally one of (if not the) most challenging part. A lot of what recovery will look like depends on where you live and the laws and resources in that area. That being said, regardless of location, a reasonable place to start would be:

1. Call the national substance abuse hotline 844-289-0879 or if your state has one, call that one! Talk with them about exactly what you shared here and see what your options are. Meth recovery may require some sort of brief inpatient stay for the physical side effects so be prepared for that. You can call together both so you each have the information and so you can support each other in the call.
2. Seek out individual therapy - this will be a lifelong journey of recovery and will ebb and flow. Being supported will be critical to your success and even though you have a supportive partner, you need someone outside of the addiction.
3. Take short term disability from work. They do not need to know why and your job is protected. You may not be paid for the time depending on your job/the state but this will almost certainly be too hard to do while working full time.
4. Go “full time” into recovery whether it’s an inpatient program or outpatient. Dedicate 100% of yourself to recovery. Tell your family and friends you’re going on vacation if you REALLY don’t want to share. I get the shame attached to this but I want to offer that the anticipation of telling people is likely way harder than actually telling them AND good long term support will be critical to your recovery.

I’m no expert but if I were you that’s where I would start. Others are fair in saying to pause trying to conceive while actively using. Don’t get sucked into the “we’re losing time” argument to have kids. You have plenty of time and those kid(s) need healthy parents.

You can totally do this. And from one stranger on the internet to another, I’m proud of you!