Is this useful if I’m brand new (no JSS yet)?

Especially useful. New freelancers usually struggle with two things: a hero/overview that doesn’t convert because it sounds like every other beginner, and applying to wrong-fit jobs that hurt JSS once they win.

For new profiles I focus on: positioning narrow enough to win the first 3 jobs, hero/overview that signals expertise without inflating it, portfolio fillers (spec work / pro-bono / personal projects) that outperform "I’m new" disclaimers, and the proposal pattern that beats the “I have 5 years of experience” openers most beginners use.