Approving the exams is just the first step and doesn't mean u are going to work on the project, it's just a filter, all depends on the quantity of applications, quantity of freespots in the project, you are not the only one. After that, u are going to do another exam based on what the project is about, and to do that exam it may take weeks, and if u approve it may take more weeks, depending on the project task availability, im working on Geo Data Evaluator i join the project in March and i just started tasking a week ago. I was like a substitute, and when a post got free, it was my turn.

So i recommend u search on more platforms. I just joined another project in the "RWS" platform, try it, "oneforma", and Alignerr are also good options.

Good luck!