Is it difficult to create a music studio at my house?

It is if you're referring to a professional studio. But if you are thinking about making something not too big and for your hobby, it is not that difficult.
I also have a studio in my house, and acquiring the equipment was not that difficult. I also recommend trying to find some equipment which is not that expensive, but which quality is still good.
It also depends on which kind of music you want to concentrate, because some types of equipment are quite expensive, while others are less. This site https://musirank.com/ was very useful for me, and I found many things for my studio here. Good luck, I hope it will help you as well.