

For security disable password authentication - use public key instead, disable root login via ssh - use sudo or su from another user.
To reduce the number of attempts of others trying to get in change the ssh port and/or set-up fail2ban.
You could also set a firewall rule to only allow ssh from your IP address, if you have a static address at home and only need access from there, or have a way to VPN into your home network. Make sure you have a static address if you do this though, you don’t want your IP to change and be left locked out of your server.
I mean the original anti-piracy ad said you wouldn’t steal a car, because they were trying to equate digital piracy with physical theft, it’s the meme edits that say you wouldn’t download a car