Will i be successful as a musician?

It depends on your determination and will to continue. If you want it to just be a side hobby or something like that the amount of time doesn't need to be stressed but if you are serious about it then the only component that really matters is you effort and time. It's not easy( I am also a musician) It really does take time and you have to be able to notice your improvement and not just failure. but the longer and harder you try the better you get, and then you can determine whether you are a good musician or not. but if you put your whole heart and lots of time and energy you WILL be a successful musician.(hope this helped)

Aa i believe is the answer to your question

His contribution to the orchestral genre mainly lies with foreshadowing ideas that are to come like the emergence of the classical symphony, the cadenza for a keyboard, and paired instrumentation;