Chemistry was terrible for me. I honestly have no idea how I passed it with a B. Youtube and Google were great. My professor was a PhD, and his lectures really showed it. If you didn't already have a basic knowledge of chemistry, you were lost for two hours a week in his class.
Youtube the things you don't understand, especially to help nail the formulas for things like molar mass, Avagadro's formula, and the hundred other mathematical equations needed. Google things you don't understand and make notes. If your professor makes himself available for questions, take him up on it. If you have a group of friends in class, try to get a study group together. I had a much easier time understanding formulas and how to apply them after going over them with my lab partners.
Google was my best friend, lol! Also YouTube can be so helpful. Flash cards... It's not so bad if you have an open mind. Drawing pictures helps me a lot too. Good luck if you need help private MSG me I may be able to help!