It’s hard to improve on the replies you have already received. However if you decide to disconnect and clean the battery terminals, disconnect the negative terminal first and reconnect it last. If you disconnect the positive first and touch the frame the battery will be shorted. A couple of hundred amps at 12V can weld a wrench to the frame. I did this once with a 69 Buick, I don’t like to think what it could do to a new car with its electronic and computers. The following link explains it better than I can.
In your place, I would clean the terminals and replace the battery if it’s more than 3-4 years old. There should be a sticker with the date on the battery.
Ed B.