Win10 WSL Ubuntu Miniforge3 - installing Sagemath - How toSet PATH in .bashrc

I am a newbie in Ubuntu. In Win10, I have installed WSL2, then Ubuntu and now I need to install Sage Math on top.

On running this cmd: $bash Miniforge3-$(uname)-$(uname -m).sh ---(1)

I get this display: Welcome to Miniforge3 24.9.0-0 (so it is installed OK)

Next, I need to run this: $conda create -n sage sage python=3.11 ---(2)

but run into this problem: conda: command not found and command "mamba" not found

The contents of the miniforge3 directory are the following:

=2.17 _conda compiler_compat condabin etc lib man sbin shell x86_64-conda-linux-gnu
LICENSE.txt bin conda-meta envs include libexec pkgs share ssl x86_64-conda_cos6-linux-gnu

Can you provide some idea how I can execute (2). Command "conda" is not here but "_conda" is.
I am unfamiliar with Linux / Ubuntu file system to correctly set a PATH command. I can move to
the miniforge3 directory and execute(2) from there?

Thanks for your help or ideas.