Problems installing Couchbase on Mac

I am having issues installing Couchbase SDK for Python on Mac and am new to this.
My pip version is: pip 20.0.2 from /anaconda3/lib/python3.7/site-packages/pip (python 3.7)

I am aware anaconda causes some issues, so also tried using python from homebrew, with:

brew update # get list of latest packages
brew install python
pip3 install couchbase

The first two steps run fine, but I then get a long error ending in: ERROR: Could not build wheels for couchbase which use PEP 517 and cannot be installed directly

Also maybe a silly question but what’s the difference between pip installing the SDK and downloading the Couchbase Server from this webpage:

Any help would be much appreciated