Auctioned house with renter in & unsure how to legally start BRRR

[Murphy Knox]

Hello, I just finalized an auctioned home purchase and am unsure of what approach to take going forward.  There is currently one renter in the duplex and I plan to start rehabbing the property immediately.  I am unsure if I legally am allowed to go and view the interior yet and would very much like to do so as soon as possible.  I think i would like the renter to stay during construction, while i rehab the other unit.  I don't have any of the rental information from the previous owner: rent, length, how they have done making their payments, etc.. The exterior needs to be worked on right away for the insurance company.  I should be able to start on that immediately correct? Any help is appreciated.