Advice for replacing a Windows 2012R2 file server

We have a small company network that includes one Windows Server 2012R2 file server necessary to run Sequel for two server hosted business applications, file and print services for the user accounts and is also the Domain Controller for the Active Directory local forest and domain.  Six Windows 11 Pro workstations are domain attached to the file server.

The workstations all have a local user account and after domain attaching to the file server, a user.Acme user account with Administrator rights to their local computer.  Each has its own 192.168.1.x static address and uses their domain user account with mapped drives to access the fileserver.

The existing file server name is ACMEWS2012R2, local public static ip 192.168.1.12, DNS Domain Acme.LAN, Netbios name ACME, local accounts are located in \Users\username, and runs SQL Server Express 2012 with default MSSQL database name and mixed security using the SA with password credentials.  The new file server will be using Windows Server 2022 (the company apps are not yet certified for 2025) and SQL SVR Express 2022 and I am looking for information about what configuration decisions I can make to hopefully minimize the need to install new user accounts on the workstations, copy all the user folders between users accounts and reinstall applications.  

My understanding of Domain security is limited, knowing just enough to get workstations attached and properly accessing the file server SQL based applications.  My Google results have provided some piecemeal answers, but I would like to better understand the big picture before starting the server upgrade and make some irreversible configuration choices that would cause unnecessary work re-attaching the workstations.

I would first ask for recommendations whether and why to keep or change each of the following:

The file server machine name

The file server 192.168.1.12 IP address

The file server Administrator account and password.

The Acme.LAN forest and root domain name that was defined after adding the Active Directory Domain Service role that also added File and Print Services and Group Policy Management.

The SQL Server Express default MSSQL database name

The SQL Server Express SA account name and password

I would also ask about the best steps for disconnecting workstations from the old domain then joining the new domain to hopefully retain the existing workstation user account, or if not, to minimize the need to copy users folders between the user accounts and / or uninstall then reinstall the workstation applications to properly authenticate to the new user account.  I would greatly appreciate some experienced insights for how to best accomplish these upgrade goals. Thanks, all!