Assistance with web lookup pulling result of zip code input

Hi all and thank you in advance for any assistance. I'm in over my head on a project and looking for some help/guidance.

I want to pull information from a website based upon the information input into my worksheet.
A1 = OriginZip
A2 = DestinationZip
A3 = Zone

When zip codes are entered in to B1 and B2, run the vba script to this url (forum wont let me post URL, so google "find fedex zone" and click the top result) entering the zip codes and retrieving and entering the resulting zone in B3.

Any help or guidance would be greatly appreciated. I'm not terribly familiar with the visual basic editor but I know how to navigate to it and know some basics. Using mac with Excel up to date version 16.12

I'm using this youtube video as a guide but the issue I'm running into is the page I'm trying to pull from does not allow me to enter a URL like ..?origzipcd=xxxxx
youtube video name = "Excel VBA Pull Data From A Website"