Argentine Tango is not a hard dance to learn. You can learn enough about Tango to start dancing after an hour - and you will still be learning 50 years later.
They say "If you can walk, you can Tango". And it is true. It may take a bit of time to get accustomed to walking while embracing a partner, but after that, you are good to go.
A beginner's Tango should be a simple Tango. Listen to the music. Let it soak into your heart and bones, then move to it. Walk to the music, slowing down or pausing when the music pauses, speeding up when the rhythmic tempo is faster.
That is it. It you can do that, you are dancing Tango.
As you learn more, you can add pivots, turns, elegant variations on the walk, dramatic figures. But it still all comes down to what you learn at the very beginning - Embrace your partner. Feel the music. Move to the music with your partner.