My stbxh was a high earner and I had (still have) a successful career, but doesnt compare.
Being a SAHM was never an option for me as I'm very career-minded although did take a couple of years off for 2 mat leaves, and worked part-time (3-4d/wk) after kids were born.
When I decided to end the marriage (for other reasons although finances played a big role), my stbxh turned into someone I no longer recognise. He's managed to leave his job, dispose assets and make himself a pauper in a matter of a couple of years. There is absolutely zero recognition for me taking a step back in my career for our family, and if anything, he expects me to be grateful for the lifestyle we've had....and to leave with nothing!
He's also withdrawn from family financial responsibilities and taken every means possible to financial frustrate me and prevent me from progressing matters in court so I could accept his pitiful offer. Thankfully, I've somehow managed to keep going and we've had a final hearing where he still withholds financial information, suddenly has more liabilities than assets, has assets transferred to others or disposed of and has an army of legal representatives, whereas I can no longer afford representation. Regardless, I've kept going and still can't believe how far I managed to get (all thanks to having my own career/finances, albeit relatively tiny)!
The morale of the story is "always be prepared to single-handedly take care of you and your children." A husband can be a totally different person to an angry stbxh! I'm lucky I stayed ambitious and independent, even though it's been hell! Had I completely let myself go and trusted that what's his is ours...and of course, in enabling his career by taking care of the family...etc, I would be telling a much different story.
So, my advice to you is to get yourself a coach (happy to recommend), take the opportunity you have to find yourself, create a vision that is totally aligned with your values, start a business if that's an option and use childcare as and when needed. Keep moving up and be ready to go it alone, if ever needed!