When is the best time to get an implant?

They say that even with implants, your gums need to be healthy.

Is there a specific age group for getting implants?

Are implants more popular these days than dentures?

Is it better to get an implant if you are missing a tooth, or should you opt for a bridge?

Is it a mistake for someone who cannot get an implant?

I was born with strong teeth, so I haven't had to worry about this before.

Since there is a family member with dental issues, I have no information on how to take care of them.