Welcome, Johncy, and congratulations on making your first soap!
You can "zap-test" your soap at any time to see if it still has active lye, or if it is safe to use. I encourage you to do a search of this forum about zap-testing. It is cheap (free) and very reliable.
However, just because soap is "safe" doesn't mean that it is ideal. Soap needs time to "cure." Curing not only consists of losing the excess water weight, but also the time to allow soap crystals to form inside the soap bars. In general, the longer you allow it to cure, the better the soap will feel to the skin.
Now, high olive oil and especially 100% olive oil (aka Castile) soaps are rather unique. Even after they stop losing water weight, they are not fully cured. Most people cure Castile soap for at least six months, and more often for a full year. Before that, the lather will be very minimal, and the soap will feel slimy, with strings of soap sticking to your hand when wet. You can search this forum for pictures of slimy or "snotty" Castile soap.
If you want to try a slightly different process that may result in a shorter cure time for your Castile soap, search this forum for Zany's No-Slime Castile. Not everyone likes it, but many people swear by it.
Hope that helps, and welcome to the SMF forum!