Realised i have a second hole next to my anus but does not release anything. also, i have a small lump, like an extra piece of skin, between this hole and my anus. what are these?

The hole is a benign sacral dimple: Visit this site for more info: https://my.clevelandclinic.org/health/diseases/17780-sacral-dimple#:~:text=A%20sacral%20dimple%20is%20a%20small%20indentation%20(dent)%20in%20the,of%20an%20underlying%20spinal%20problem. The skin tag may be just that, an anal wart, or an external hemorrhoid. You could have these checked out at your next visit to a doctor.