What programming language should I learn to create a new altcoin? I've been wondering. What programming language is needed to develop and maintain an altcoin? Because I've been thinking to try creating my own altcoin.

I've seen a lot of services to develop an altcoin for certain amount of money. I could pay for it, but I prefer not to since it would be boring as hell to just do that and there's simply nothing that I can be proud of.

I've seen a step by step guide, forking from Litecoin. But I kinda want to do it blindly. (Meaning doing something that I don't understand at all).

I've learned Java and VB but I don't think it's even used a single bit in Cryptocurrency.
The most likely you followed this link to create an altcoin.
If you feel that C++ is a bit cumbersome, then I would try Python.