Hi Angel just follow your heart.

I don't think there is any "right" answer for a question like this. It really boils down to what language is most in line with your interests. If you like Spanish culture, including Salsa dancing etc. then Spanish would be a wise choice. If you find yourself drawn to German culture and language, well,,then you know what your choice should be! If you find the flow and sound of French to be pleasing to your ear (along with its own rich culture) then as Marie-Hélène said you have plenty of support and help options here. Whether it is for business or as a hobby, you should never learn a particular language because it is one of the easier ones but because it is something you are very interested in or have a strong incentive to learn (for example if it is job-related). If you don't have a strong reason for learning a particular language you could find yourself losing interest quickly as it becomes more difficult. Best of luck in whatever language you choose to pursue!

Hello Angel If you decide to learn French... you can have a lot of support here on Italki... I will help you the best I can... Good luck with your choice!

Hello Angel_hu, None is better for a Chinese to learn. It is your choice after all and your priorities. Maybe learning to dance Salsa attracted you towards the Spanish language,so you are more motivated to learn it. I would say German is a more difficult language to earn than Spanish. If the difficulty is not an issue for you ,so just choose any you like or might be using in your career or later in your life in general . There are also other languages such as French and Italian, they are romantic ones as Peter mentioned. If you like far eastern languages that might resemble your language in a way，then Japanese is another choice. Suit yourself ；） 加油

Have you considered learning French? It's another romantic language, similar to Spanish.