What_to_study
Try to learn about what is ipv4, ipv6, CIDR, OSI Model, what are ports, Switch vs Router vs firewall
Comptia A+ https://www.youtube.com/watch?v=iYRmydayPFs
Video of Building a PC https://www.youtube.com/watch?v=v7MYOpFONCU
Network + course https://www.udemy.com/course/networkplus/
Microsoft Active Directory https://activedirectorypro.com/glossary/