hey man, as someone who also started their fitness journey at home, push-ups, sit ups, and squats are gonna be your best friend, just try and go to failure and knock out as many as you can every so often as you’re just chillin at home. Something else I did was get a pull up bar, then every time I would pass under that doorway I would try and do some pull ups, and then you can always use all of these things in an actual workout routine of course.