Consider using first year python resources.
If you have not done so yet we have a notebook-based tutorial you can work through here
If you would like more formal training in python you can work through a full language tutorial:
You can also take a more practical / hacker approach.
(Advanced) If you want to develop coding skills beyond the scope of this course your best bet is to both start personal projects and do some coding challenges on websites like:
Resources on this website: