What is the proper way to install the latest version of Go on Ubuntu 18.04?

This question might be overly simple, but I just want to make sure I’m not falling into some anti-pattern regarding package installation.

I found the official installation instructions; however since what’s available is a tarball and I already have the golang-go package installed via apt, should I simply remove golang-go, or what?

If I leave golang-go in place and just unpack the tarball according to the instructions, then the older version of go (in /usr/bin/go) is still first in my PATH lookup, so this doesn’t seem to be a workable option.

Is there any drawback to uninstalling golang-go and just using the tarball only (as per those instructions)?