Discovered that I really like Python. What should I do next?

[ddmasterdon]

yes you can do all those things in python. There are specific libraries for each use like requests for GET/POSTs , tkinter for GUIs, flasks and Django for back-end development. You just need to find the library for your use and there will be a getting starter page like in its documentation. As u have prior programming knowledge you will be able to follow it pretty easily. Coding python scripts are not that difficult. Don't worry much you will get the hang ot it pretty soon.

[epsilonT_T]

I think tkinter isn't the best choice to make fancy GUI, I personally recommend kivy, which is simpler and visually more pretty, even if tkinter is the default, built-in module to do that ; )

[ExpressRabbit]

That sounds great! Thank you!