The draw for the group stages takes place on Monday, 16 December in Lausanne, Switzerland, at 17:00 GMT.
Including hosts Switzerland, 16 teams will take part in the finals that will be held across eight venues between 2-27 July.
The group stage sees four groups of four teams face each other, with the top two in each group progressing to the quarter-finals.
Having qualified via the play-offs, Wales will be in Pot 4 for the draw.
Holders England will be in Pot 2, while World Cup winners Spain are among those in Pot 1.
“We’ve already started asking each other who we would like and everyone’s putting in different teams,” said Fishlock, who also admitted realising the dream of reaching a major finals was “beyond my wildest dreams”.
“But we’re just so excited now it almost doesn’t really matter what the group is – we just can’t wait to get there and experience it.”
