Ubuntu SSH port forwarding 22

Hello, how can i configure port forwarding to connect in mu ubuntu from putty from external ip.
In local pc i can connect succesfully, but example from VPN i can not.
Here;s is my firewall rule in ubuntu.

I know that the answer is to add port forwarding in NAT but I have tried many types but without success.

Im noob with Terminal so please tell me how to do it in IP>Firewall>NAT… with step by step.

Sorry for my english. Thank you in advance.

But how your problem is connected with Mikrotik?

Because i search in google for problems and i find the answers to add port forwarding(22) in mikrotik to allow you to connect in your ubuntu from external ip.

So my ubuntu pc is directly connected in my mikrotik with Ethernet Cable. my mikrotik has this pub ip 185.192.164.X and my local ubuntu pc have this ip 192.168.88.62.
So i tried to add New NAT rule - Action: dst-nat, To Address: mypublicip, To Ports: there i don’t know what ports i need to set also in Action Tab!.
All what i need is to configure my mikrotik with ubuntu to access in ubuntu server from another “locaton” with putty.

I hope you understand me.

Start from here
https://wiki.mikrotik.com/wiki/Manual:IP/Firewall/NAT#Destination_NAT