It is not enough to visit a museum once. I’ve been to British Museum several times and I still have a lot to explore and learn. This apply to any other museum here in London. And is free to enter. You do not have to pay. You can donate if you want to support them. If you did not visit it yet I hope after you’ll see the pictures you’ll put the British Museum on your bucket list.
Minutes away from British Museum you can go to Covent Garden. There are so many narrow roads to explore there. Also there are plenty of shops, restaurants and coffee shops. If you did not see how Covent Garden looks in winter time you can check this HERE.