Find a bike club that rides mid-week. Get outside. Get a MTB bike and hit some trains. Get a gravel bike and do some adventure riding.
Also find a project for after your work life - something you are passionate about and find interesting - learning about stock options, model trains, whatever floats your boat.
Going to the gym is great. You could take that up a level after you develop some overall fitness. It will benefit cycling.
If your intent is the ride more, start leaning about the polarized approach. The way to increase volume without being constantly fatigued is more long, slow rides.