Add more topics to learn

[arpit-omprakash]

Add more topics to the checklist in the README.md file. These topics will then be worked on and appropriate notebooks created. Add to the checklist with topics that you think should be added.

Feel free to add topics, but do create an issue for each topic you add. Please use the Topic Request template while creating an issue.

[arpit-omprakash]

Feel free to create an Issue for the topic you want to work on and then proceed to build a Python Notebook on your forked repo and create a PR