anaconda change 'base' environment permanently to a different environment 'myenv' to startup at terminal openings

I would like to cahnge the 'base' install environemnt that inisiates when I start a terminal to an a diferent environment that i have created called 'myenv' anaconda evironment.

I want that 'myenv' stats every thime wen I star the terinal.

I have turned off the 'base' environemnt from initaiating. conda config --set auto_activate_base false

I am on Ubuntu 20.04