You have activated all the required services, see blogpost. You have your setting correct. When you type in transaction SOAMANAGER in the easyaccess screen you get server cannot be found error message.
Change the HTTP port to 5000, NetWeaver sets the port to zero by default but your SOAMANAGER will not run with that port setting. It can be any free port, I just selected 5000.
You have to check the current port number using SMICM t-code
On the Easy Access screen, enter SMICM in command field of SAP easy access and hit enter
Click on Go to in the menu bar and then click on services
You can check the HTTP port from the resulting screen
By default HTTP port number is 0
You have to change this HTTP port to 5000
Check the HTTP port and on the top menu click Service\change
Change to 5000
Click the check button
Go to the easy access and enter soamanager
For Webservice/SOAManager, the server name must be in FQDN. My server was initially a stand alone but I joined it to my domain to give it an FQDN. Change the http name to the FQDN so change
else it will not work.
Log into the Soamanager