Just remember that these days taking pictures anywhere is not at all noteworthy. New shoppers all feel like they will be spotted. Even veteran shoppers get nervous when doing a new type of assignment.
Also, in many cases, doing the low-paying newbie shops well and reliably will mean that the MSC will let you see more and better paid shops in future.
One route to better paid shops is to seek out MSCs that do bank teller shops, do those well and begin to see better paid bank shops. Also, learn to do $12 parking shops and move up, with different MSCs to higher paid ones. Finally, find shops that reimburse you for expenses you would otherwise have to pay for, like oil changes, hair care, groceries, tire rotations, dry cleaning, etc. The value of those (i.e., the reimbursements) are really non-taxable income to you.
Where are you located? Forum members may be able to point you in profitable directions if we know what city/towns you are near.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.