How can I get Health Insurance License?

Requirements for licensing vary on a state-by-state basis.
One thing that is always the case is that you will be required to take a pre-licensing examination specific to the line of Health Insurance. Many states allow anyone to take the exam without specific education requirements (although pass rates are very low for individuals who do not prepare first). Other states have classroom or course requirements, so agents will have to demonstrate that they have passed an approved prelicensing course before they can take the licensing exam.

Once you have been licensed in one state, transferring your license is usually pretty straightforward, and you will just want to contact the Department of Insurance of your new state and find out the process from them.