England were drawn in Group D alongside Denmark and China for the finals co-hosted by Australia and New Zealand.
The fourth spot will be taken by one of Senegal, Haiti or Chile depending on who wins the playoffs in February 2023,
The Lionesses are on a high after backing up winning the Euro 2022 title on home soil in July with a 2-1 win over world champions United States a fortnight ago.
However, Wiegman said plenty of work remains.
"We have built some trust and confidence, but we know we have to be better next year because the game develops so quickly," said England's Dutch coach.
"So there are so many competitors and favourites for this tournament, so we know it's really tight.
"We just have to keep working hard, getting our plan right and developing our style of play."
Wiegman was pleased with England's draw but is wary of Denmark, who are led by Chelsea star midfielder Pernille Harder.
"It's an exciting draw, we know Denmark very well, they are very technical and have a nice, very recognisable style of play," said Wiegman.
"China have been in transition a bit and have a new coach, they struggled a bit at the Olympics, but are good opponents."