Microeconomics and Personal finance are not similar to each other.

Microeconomics is the study that focuses on the behavior of a consumer and a producer at the individual level. It explains the allocation of the scare resources from the consumer point of view. The sole motive of an individual consumer is the utility maximization and the sole motive of producer is the maximization of profit.

Finance refers to the management of money, credits, investment. Finance focuses on the price management, flow of money, interest rates. Finance is categorized into personal finance which includes the financial decisions and activities of an individual regarding savings, insurance, retirements, used of credit cards and more.