I've just joined a project which is developed for internal use for over 10 years now. There are no unit tests nor any other manual/automated tests designed. I'm going to be the only tester.
What should I start with when it comes to testing in general? There is no detailed specification or documentation.
I was thinking of going through the past bugs/tickets/stories developed and prepare test cases based on that. Also to start preparing test cases for regression tests for key functionalities. In the future, I will consider automating the regression suite with Selenium most likely (especially that my exp is very little in this topic).
The project is developed in .net and .net core technologies. Please share your thoughts and experience. Thanks!