See if one of the testing centers is at a community college. Take the information to an adviser and see if you can get some accommodations for the test.

You have to prove you have a learning disability. If you don’t have your records, check with the school district you attended. They have to keep them for quite a long time. They can get this for you.

They cannot change the content of the test, but you could get more time to complete it etc. If your skills are low, look for some adult education classes in your area. Also go to the community college and ask for advisement. They may be able to help guide you to what you need.