Both Machine Learning and Artificial Intelligence are the most emerging technologies with almost equal job opportunities. If you are interested to learn Machine Learning, you can start learning with ML. As many doubt that ML is required to learn Artificial Intelligence which is not completely true. If you are interested in learning and implementing fancy computer vision and Natural Language Processing projects, you can directly start with AI. Machine Learning is not a pre-requisite for Artificial Intelligence or vice-versa. But the common requirements before starting either ML or AI are you should be familiar with programming skills, statistics, and linear algebra.
Also, watch this video on ML and AI:
You can check out AI online course and ML online course offered by Intellipaat and kickstart your career in the IT industry.