Just a thought: why don't you just use two different aliases for the Server in your .ssh/config with your two differing ssh keys, that way you can just use two different "hostnames" that have different ssh keys specified

I hopped around in Debian-Land for a while before switching to Manjaro, converting it to Arch later on.

Now I stay with Arch because it just works and doesn't break on me.

You don't have to trust yourself not to write malware by accident, just trust that if it's malware it wouldn't run if you wrote it without realizing