Easy way to pass multiple arguments to BASH function?

I often have to access aws hosts using ssh via a jump host. I find it convenient to use ssh with ProxyCommand like this:

Long form

ssh -i key_for_destination_host.pem -o "ProxyCommand ssh -W %h:%p -i key_for_jumpbox.pem jumpbox_user@jump.box.host" destination_user@destination.host

Short form (presumes ssh keys already added)

ssh -o "ProxyCommand ssh -W %h:%p jumpbox_user@jump.box.host" destination_user@destination.host

But I have to negotiate several different AWS accounts and several different regions within each

I would like to have a script function taking 4 arguments interactively:

1. jumpbox_user (with a default value suggested)
2. jump.box.host (will be an IPv4 address)
3. destination_user (with a default value suggested)
4. destination.host (will be an IPv4 address)

then substituting these values into the command and opening my remote shell session in my terminal.

The defaults are because generally there is a common username for the jumpbox (although this could change) and a different common username for the destination host (although this also might change).

Ideally in operation I would call the function e.g. $ jumpy or whatever and get prompts similar to e.g. the awscli aws configure experience.

What is the asiest way to do this and where do I begin? A BASH function? A Python script? Something else? My workstation is Ubuntu and I have local root so I can use any framework

Thanks