Use IPP to send job to internet networked printer

I have a BROTHER HL-L2350DW PRINTER sitting on my home network.

GOAL
I wish to use the Internet Prining Protocol (IPP) to send jobs FROM outside ( ie. FROM the internet) TO this network printer.

REQUIREMENTS
* I require the username/password of this printer in order to change/check settings (see supplied imges)
* all instructions from you completed live via share screen

MANDATORY REQUIREMENTS:
- A test print from you sent to this printer (to confirm success)
- Confidentiality of all network settings


Additional Notes:
- I will consider router changes only as a last solution.