What will you do first when testing a new service if you have a diagram, a link to the stand, and minimal documentation?

First, I will study the provided service diagram to understand its architecture, main components, and interactions.

Then, I will check the availability and stability of the environment, ensuring that tests can be performed without failures.

Next, I will create a list of key scenarios and requirements based on minimal documentation and the diagram to determine what is most important to test first.

After that, I will start with basic functional testing, checking main APIs or UI elements if available.

Simultaneously, I will prepare test data and environment, and also determine which types of testing (functional, load, security) will be prioritized.

If possible, I will set up automation for repetitive tests to speed up the verification process.