You need to be clear about your goals because there are differences in how you train. For a bodybuilding workout you are going to be doing more reps with shorter breaks between series.
Do not compare yourself with others. This is almost never a useful thing to do in life. Track your own progress of course but only look at how far you have come, do not look at how much better or worse you are doing than some other guy at the gym. Especially, if you are bodybuilding, do not get hung up on how much weight you are lifting. That is not the important question, as we said above.
Anytime that you cannot make it to the gym, have some backup exercises that you can do at home. Pushups, squats, chair dips, crunches and similar floor exercises are very easy to do at home. It is a good idea to have dumbbells in the house and maybe a barbell if you have the space.
When you are following a bodybuilding workout at home , remember that it is still important to plan your routine and not to over train any muscle group.