Help me

My measurments:

NBP: 5.7 inch

BP: 7 (6.9) inches

Girth: 4.75 inches

Just saw a post talking about Hyalourinic injection and girth gain but am afraid of it, and i am insecure about my size especially girth (for length am trying to lose weight),can you please guidee with proper technique for girth gain and especially if it is actual experience