Promote Thermal Printer Android App

My thermal-printer utility is live on Google Play and now needs real traction. I’d like your help on two fronts: 1) ASO – Refine and expand my Play Store keywords so the app ranks for “thermal printer”, “bluetooth receipt”, and other high-intent phrases... (Budget: ₹12500 - ₹37500 INR, Jobs: Advertising, App Store Optimization, Content Marketing, Facebook Marketing, Instagram Marketing, Internet Marketing, Keyword Research, Marketing, Social Media Marketing)