The difference is when you draw by memory you won't remember every tiny detail, and you make/draw it in your own way vs. having the object in front of you you can copy it almost exactly.
Brave as a lion ............
Answer: Some people get a degree of some sort because it helps them get a job over someone who has only finished high school. It gives them more experience in the field, which would lead them to more success. If you compare a person who only did high school and someone with a degree in photography, the person with the degree is likely to have a better understanding of the job and know what it entails, they have experience rather than just rushing into a job, and it's not always the case that you can get the job with just a high school diploma.
Shoot it on your phone and get a free editing app or if you have an iPhone use iMovie