A Golden Retriever typically lives 12-15 years. Most of what determines whether it gets there is routine care rather than anything dramatic.
Balancing affectionate against playful
Breeds described as both affectionate and playful need the two managed together rather than separately. With a small dog that usually means a predictable routine first and training second - the routine is what makes the training stick.
Vaccination and deworming
The core course starts around six weeks, rabies follows, then annual boosters. Deworming runs fortnightly to twelve weeks, monthly to six months, then quarterly.
Keep the records
Booster schedules run from the original dates, and a new vet asks for the history first.
The annual check
Once a year for an adult dog, and book it before the hot months rather than during them.
Planning for about 13 years
A Golden Retriever is with you for about 13 years. Budget and routine both need to survive that, including the last quarter of it when a small dog needs more veterinary attention than it did young.
What to watch for in a small dog
For this size class: kneecaps and dental crowding. None is a reason not to own the breed; all are cheaper to manage early.
A breed from Global / Various, living in India
The Golden Retriever was developed in Global / Various. The part that travels badly is rarely temperament - it is the coat and the tolerance for heat. Plan the year around that and most of the rest follows.