Transition to SAHM

For those that are SAHMs, when did you decide that it was time to leave your normal job and stay home? We don’t have any kids as of yet, but my husband’s sister, mom, and both grandmothers are/were SAHMs so he is strongly in support of me going in that direction when we can. We don’t have kids yet but I’ve never had a SAHM in my life until I met my in-laws so I’m not sure how/when to make that transition. Right now, my husband and I make roughly the same amount, with his income being slightly higher than mine, but with every job I’ve had since we got married, I eventually reach a point where it’s SO HARD to psych myself up to go into work and I eventually get depressed because I just hate going to the office. Ugh. This is mostly a vent post but any advice is obviously appreciated!