If that course is from the Red Cross sure its a good one. Been through many sessons..usually taught by slab savers.
Person that knows all that would do good to snag a degree in mortuary science and make big money. No dissatisfied customers in that vocation.You could do volunteer firefighting after gaining the prerequisite certifications.
Another option is to go to your local community college and take anatomy and physiology 1 and 2. I took anatomy 1 as an elective and learned a ton of useful applicable insight.
Hands on experience will bolster your confidence in a real situations.