Installation issue on ubuntu

I was trying to following the installation guide: for Frappe Framework on Ubuntu.

I have following questions:

  1. Which version of python is needed? 2.7 or 3.x?
  2. `“sudo add-apt-repository ‘deb [arch=amd64,i386,ppc64el] Index of /mirror/mariadb/repo/10.3/ubuntu/ xenial main’” this line of instruction is not executing. The ftp address seems to be unreachable. Is there any alternative way to install mariadb?
  3. Is there any windows option?

You are following the guide for manual installation, is this intended?

The automated easy install is much simpler and will set up everything for you.

Thanks for the link.
I have some how managed to get to the Bench installation:
After using pip to install the bench from repo, when I type “bench” in command line it doesn’t recognize.
Any help on that?