Sign up for all of them, put down a decent fee that is realistic to attract orders and see if any give you work...
I debated whether to say this but it would be unfair not to - if you are starting out in your carereer or mid career with over a decade earning years left, I would consider not purusing appraisal with a residential license only- it is a path to misery and low earnings for the majority going forward.
It was not always like this but it is now. And I am saying that as a person who does almost no work for AMC''s, but I doubt my business model will survive for more than a handful of years. Go for an asessor job or upgrade to commercial license if you are determined to stick with appraising. The AMC path is brutal and miserable with stips, scrutiny and pressure coupled with low fee and no steady work flow to top it off, combined with the threat of AI and a pattern of reducing the role of appraisers from stakeholders.
Some folks might adapt to being on AMC staff working 60 hour weeks for mediocre income. There are other fields that offer better earnings or at least are rewarding or less stressful if they are lower or mid range in pay. Health care and the trades are in demand now.