Installing opencv

I’m new to Anaconda and having installed Anaconda using all the defaults have tried to additionally install OpenCV but get an ‘unsatisfiable error incompatible with existing python’.
There are some additional details of python versions with range details and some text echoing the original point of it not being available for Python 3.9.
Apologies for this being a newbie post but can I downgrade the Python version in Anaconda to suit or what else can I do?
Thanks for any help.