Any bike that you like to ride will be fine. Just get a bike. If it has two wheels, it will do the job. If it proves unsuitable, by then, you will have a finer vision of what you need to have.

I get the point about walking being better than riding such a short distance, but perhaps our OP will end up using the bike for shopping and social visits and maybe even recreation. It's not a bad thing to have a bike. It beats using a car for short trips!