We have several subjects,and i think (of those)English is the easiest(to follow.
可以改写一下句子来帮助理
We have several subjects,and I think English is the easiest of those/them to follow.
不用of which的原因在于,原句是由and连接的并列句,而不是非限制性定语从句.
follow是“选取;选学(=choose sth to study).词典解释为:choose and follow; as of theories, ideas, policies, strategies or plans.
those指代前面的several subjects,译作"那些科目”,可用of them代替.
of 换为among完全可以.