Hi there! I have a couple of articles that may help:

https://slyflourish.com/witchlight_experiences.html

https://slyflourish.com/dreadful_incursions.html

I'm running it now for my kids and their friends. That said my table will likely look very different haha.

What advice I can give is that the mystery mine is a bit brutal for so early.

Try to talk some players into making a pact with the ticket slinging goblin at the beginning. Maybe increase the ticket price to a gold piece or maybe 2. It really adds fun to the encounters.

NoFunAllowed has a bunch of good videos outlining the campaign. Give him a listen for a decent summary of each chapter

I haven't run it myself, but I found SlyFlourish's tips very helpful for Ghost of Saltmarsh. He also has videos for Wild Beyond the Witchlight: https://youtube.com/playlist?list=PLb39x-29puapE8g8vYg-DXDcgQbHltF8a

I haven't run the whole thing but I ran the "Downfall" location as part of my homebrew campaign and it was a highlight.

Make sure your players are cool with the idea of non-combat resolutions. Its not a combat focused campaign the way D&D typically is and usually the non-violent resolutions to quests are the more interesting outcomes.