Mudi SSH and Ddns

I have GL-E750 and gl-mifi. I’m using it with primarily my data sim with wireguard vpn and want to get the ssh and ddns working. With the current option in the router it’s not working. Even when I get to the ssh it says permission denied.

I am willing to pay / give a donation to anyone who can help me find a solution to this as its important for me to able to ssh and remotely change my wireguard configs.

I would appreciate any help in this.

You must have public IP to use DDNS, you can try S2S.