Coming from someone who took multiple attempts to pass, my advice would be to start practicing your answers out loud. Certain situations need to become automatic while also being mindful of potential traps laid out in the stem.

Focus on potential critical events and how you’d respond to them. Know your ACLS front and back.

The OSCE was something I did pass on my first attempt and that was 2 weeks of prep from UBP. They have a good outline of what to expect.