Hi Yovel,
There’s a lot of great free content for you to start before you need/want to pay for a course.
I’d start with those.
Something like Machine Learning Crash Course  |  Google Developers 7
There’s also this thread:

How to audit courses on Coursera for Free 6
Any suggestions to start with TensorFlow? - #2 by 8bitmp3 6

I hope this helps!