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If the service isn’t starting due to a changed port then one of two things are happening:

1. Something else is using that port and its throwing an error
2. There’s a configuration issue (typo, comment, or duplicate setting) that is preventing the server from starting

Do you have any logs from the server that might help with determining which of these two it is?

Also are you trying to access the service on your local network or via something like your mobile data or a VPN? Because if it’s the latter you probably need to configure your router to allow external traffic (which can be a security risk).

Did you open the port on your laptop’s firewall to allow the traffic to the new port?

What issues are you having that would require changing the port you use would fix it?