What books about OSPF Protocol, Microsoft 365, and Azure would you recommend to help me get started with my new job?

I recently received an offer (today actually) to be working as an IT Network Specialist for a construction company.

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I am a recent college grad. with no actual in-the-field experience so this is a huge learning opportunity for me.

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I will be working directly with the IT Director of the company and today he took me to lunch to briefly discuss the actual workings of the system and network. He told me I need to begin learning OSPF Protocol, Microsoft 365, and Azure.

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What books would y'all recommend for these topics?

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Thank y'all so much! Just subscribed to this sub-reddit and hope I will be here a long time as I advance my career.