I would avoid popping the blister as long as possible. Of course, it will eventually pop on its own anyway but, while it is intact, it is providing a layer of protection to the damage skin underneath and it is preventing contamination of the burn with bacteria. When the blister does pop, leave the loose skin in place and cover the area with antimicrobial cream and a bandage to keep it protected from infection.
Also you may want to go see your primary care doctor
about this burn. Sometimes burns on the hands can be very severe. They tend to be disabling because you need to use your hands, obviously, and this can lead to delayed healing. Also the risk for scarring should be assessed, because scar formation in the hand and fingers can be a big problem down the road, as it makes parts of the hand difficult to use. Your primary care doctor can assess the severity of the burn and determine whether additional treatment is needed.
In the meantime, protect the burn with antimicrobial ointment and take anti inflammatory medications to help reduce the pain and swelling.