If you just want to learn 'something' and not do any real project, by all means, learn python. Python is a great and easy to learn language that lets you make great programs, and not only webbased ones! Python is a very well supported language, it runs on linux, mac and windows so you can use it wherever you want.
If you just want to make a website for yourself and don't want to spend too much money, I suggest you use php. If you want I am sure you can find some webhost that offers you some webspace + domain name for around 20$. Will that be a very good webhost with lots and lots of space/traffic? Probably not, but I'm pretty sure it will enough you for some time. And besides, if you find out php you're not into making websites, you can have a wordpress blog up and running in about 5min, without any php coding required.