Humanities & Social Sciences

Steps to be taken:
Make sure your Fundamentals are strong as the Fundamentals will always be the Fundamentals they will never change. Make sure your pronunciations are spot on. Read a lot, while you are reading, read it out loud so that your ears can hear the pronunciations and the sound of the words. Write, practice writing as much as you can, try to correct yourself. Start speaking in the language, it's okay to make mistakes, never be afraid of making mistakes, cuz we humans learn best from our mistakes. Enjoy the language, Try to find a reason of why do you want to learn the language. There has to be a strong reason behind your desire to learn or else you will stop mid-way. Do not force anything, everyone has their own pace of grasping things give yourself enough time. Love the language, embrace it with your body and soul and the language will return itself to you.

Economics is however regarded as a science subject but the field is different. Though economics is based on using science calculations but they are completely different field. If your future is concerned with arts then you will have to choose economics, if your main focus is on science then you may take science and can fall into the field of micro or macroeconomics as per your interest.
If you choose to study economics then you might deal with economics itself majorly but if you choose then I think you must focus on 12th and 11th grade but according to my knowledge you may try to occupy a degree in actuarial science which requires proficiency of maths, science, statistics, accounting or business.