In this tutorial, you are able to learn Tensorflow in 1 day, practically. For theory, I suggest reading this book.
a. Useful TensorFlow operators
b. Tensorflow Neural Networks
c. TensorFlow Deep Learning
d. TensorFlow Convolutional Neural Networks (CNN) for image recognition
e. TensorFlow Recurrent Neural Networks (RNN) for text analysis
Based on my experience, building a startup is not an easy task. It does required perseverance for a long time. Many of us, especially millennials who are likely to take a leap of faith and jump over onto the battleship without a proper planning because thinking that they could make fast money and freedom in terms of time. But the fact is that the reality is totally opposite. 90% of the startups will fail in the first year of the operation and they ended up became a part of this statistic.