Can someone put my mind at rest with my beer fermentation

I'm a (very) amateur beer homebrewer and have started brewing again after 2 years. I'm 1 week into the ferment and noticed the brew stopped bubbling through the airlock after about a day. It suddenly stopped, there was no slow run down or anything. My previous brews also developed a thick foam that coated the top but this brew has none. I'm probably just overthinking as I really want my first brew in a while to be successful but can anyone explain if signs are good or bad for me?