Picking up the language, vs picking up what is idiomatic code, what is where in the standard library, which third party tools/libraries are common to use, etc are widely different things though.
This is a general programming intro course that happens to just use Python, I don't know from where do you get idea that it will make emphasis about the python ecosystem. Will it make you a better Python programmer? probably, but you won't gain much if you already really did SICP. And since you are "seasoned" programmer you will have to deal with all the what is a variable, what is function etc.. all over again.