Can we conduct Interviews + Usability Tests in the same session? Let’s say 30min + 30 mins each

We're about to launch our MVP and as the sole designer of the team, I know we will have some usability issues. Besides, I want to know if the product is a market fit because the main members of the team didn't conduct proper user research, only some small market research. Therefore, I want to conduct Interviews with users and then do Usability testing for onboarding process. Do you think this would be possible? Thanks.