Book marketing

I'm the author of a self-published, task-based programming education book, on Amazon. I need help securing paid promotional placements with content creators. Looking for: outreach to YouTube creators, podcasts, and newsletters focused on Python programming education. Target audience: primarily US-based; UK/Canada okay if audience is strongly US. Budget: $1,200 total — this is the full, final amount for everything, including your fee AND any payments to creators for mentions/placements. There is no additional budget beyond this; milestones will be structured within this total. I'm looking for genuine, negotiated placements — not a broad blast list — creators whose audience actually fits programming/Python learners. Please share 1-2 past examples of similar tech/educational book campaigns, and how you'd structure milestones within this total budget.