As a B. Medical Science student who has recently graduated 2 months ago, I can say that Biology is not an easy subject. There are many different concepts to learn (like maths, chemistry, physics etc) however when you step outside of the classroom setting, you start to see its relevance and how everything interrelates.
My recommendation is to look up many different educational websites containing animations. Doing this helped me to understand the replication of DNA etc.
Goodluck to all of you studying Biology and whatever other subjects that come challenging your way! :)