Volunteer hours?

I’m starting to look at colleges a bit early (I’m a junior) and prepare for them. I know volunteer hours are pretty big, especially with competition. I just had some questions about it that I hope some people can answer!

How much volunteer hours are the average and looks good for colleges without overdoing it?

Can all the volunteer hours be at the same place? Or should it be different places?

Where I’m from it’s difficult to volunteer at an actual place, as much as I would love to do so. COVID doesn’t help much with this situation either. Can volunteer programs online count and look good? (Rn I’m part of a volunteer program which makes little note cards for kids with special needs)

Thank you to those who answer?
Volunteer hours?
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