I’m going to put in a plug for the Paddington neighborhood where I’ve stayed off and on since 1972.
Is it a lovely, leafy area? Nope but it’s fine and has evolved.
63 Bayswater is a BnB that is a 15 minute walk from Paddington. For decades you could secure a safe, comfortable and affordable room there . Breakfast is included in the price. It has an elevator. There’s 2 pleasant pubs near by: the Mitre Paddington and the Victoria Paddington. The small Tudkin Flavors of Malaysia is 2 blocks away.
From 63 you can walk across Bayswater (at the light)
into the Italian Gardens into Hyde Park. I’ve always used that area to stroll in the wee hours ( gates open at 5am ). Turn right and head into Kensington Gardens or stay on the path that abuts the Serpentine and pass the Princess Diana Memorial. At the Lido you can sit down and watch the swimmers in the Lido.
If there on Christmas Day you can watch the traditional Peter Pan Cup Race.
Lastly, the Lancaster Gate Underground station is nearby. And numerous busses can be taken on Bayswater Road.