Remember, you should never use a cheap chinese plastic airlock as a "fermentation Gauge," it's not...It's an airlock, nothing more, a VALVE to release excess CO2, to keep from blowing the lid off the fermentor...If it's not bubbling that just means that there's not enough CO2 to climb out of the airlock, or the CO2 is just forming a nice cushion on top of the beer like it's supposed to, or the airlock is askew, or it is leaking out the cheap rubber grommet, or you have a leak in the bucket seal...all those are fine...if CO2 is getting out then nothing's getting in....
Over half of my beers have had no airlock activity...
The only gauge of fermentaion is your hydrometer. And it's too soon to worry about it. You didn't happen top notice this sticky when you were posting your question did you, it kinda sums ups what's going on
https://www.homebrewtalk.com/f39/fermentation-can-take-24-72-hrs-start-43635/
Just trust that the yeasts have been doing this for over 2,000 years, they are the experts at this, not you, and they don't need you messing with them when they are trying to do their jobs.
If CO2 is getting out through anywhere, like the airlock, a bad seal, the gap in the gromment,
Nothing can get in. You can't have one of the other...Co2 pushes O2 and microorganisms out...
Besides it's really really hard to ruin your beer, especially if you are a new brewer...
SO,
Come back in a week, or two, or 4 and everything will be well...