I have been going to gyms for the past 16 years and I have never felt overly self-conscious at them no matter what my weight was. I know that this is not the case for a lot of people and that a lot of people have to overcome fear to go to the gym and use the equipment and share the locker rooms.
For anyone who is nervous at the gym I can at least say that speaking for myself I rarely notice anyone else when I am working out. When I do it will either be purely aesthetic appreciation for someones strength while they are doing something I am incapable of doing (like pull-ups) or it will be to feel incredibly proud of someone who is clearly overcoming obstacles to be there at the gym. This can really apply to anyone who doesn’t blend in as the average gym member at whatever gym I am at.
When I see individuals who are heavier than the majority of those they are sharing equipment with, those who are much older, the occasional unsure teenagers that are there alone, or individuals with obvious disabilities that are not being held back, I do notice these people in passing and I would be lying if I said I didn’t. I never notice their body types or judge where they are at in their journey. I have no idea what their goals are. But the same strength that brought them to the gym, gives me strength. We all have our battles, some are just more obvious than others.
Never am I “bothered” by anyone of any body type or skill at the gym. I am never disgusted. I never notice anyone else paying notice to others. Never do I think less of someone or hear others voicing any feelings like this. If anything, I think more of every person I see there.
Don’t fear the gym. When you are there, everyone else there is working on themselves just like you are working on yourself.