Hello, I’m worried

hello i always had this little bubbles on my penis, but didn’t know what it is, i wonder if you can explain this to me, because i’m worried about.

Seems like a cluster of fordyce spots, they are completely normal. Don’t worry, I have those exact spots. Maybe not as much but it’s a natural occurrence and will most likely fade away as you age.

What age are you? How long have you had the darker spot towards the lower part of the photo?

i am 19 years old i have the darker spot since i was a little boy

To be 100% safe I would get it checked by a medical professional.
In general terms if you are not aware your penis will continue to develop naturally until you are around 25-26 YOA - usually by this age how your penis looks will be like that for the remainder of your life.
So yes, your Fordyce Spots may fade, you may get additional ones you may get other spots and glands appearing - we are all individual, and therefore to some extent our penis is slightly different from everyone else’s