Simple Login / Register pages for Peepso

I currently have a peepso community up and running. I don't care for the Landing Page. It is confusing to some users. Desktop it is fine - but mobile it puts the register section on top of the login section and people don't scroll down to see the login section trying to use the register section as login. Yeah they get a little confused. I want a simple login page. Then a register page that's separated. I think this will have to be created in a "child theme" so updates won't be an issue. I have attached some mockups. On the registration page I DO NOT want the background in the mockup of the flags etc - I want it to be a white box just like the login page meaning the lettering would be a dark grey matching etc. I can provide the graphics for this of course along with links for the privacy policy and user agreement. I will also provide the color code for the background. I know this isn't a big task and can be done fairly quickly.