Does your admission chances increase being a younger sibling to two older brothers who both attended and graduated with High Honors? They are 13 and 14 years older than me if that matters.
What colleges? What’s your record and is it in range for whatever colleges this is?
Take a look at the school’s common data set and see what (if any) weight they give to legacy/family connections.
Some of the private colleges do this. They call it sibling legacy. Not so common in public universities though.