Implant process and price

Usually, I got an implant, but honestly, I lived for several years without molars, and since I managed comfortably without discomfort, I got used to it.

Since it's abroad, even the Korean dental clinics available don't seem trustworthy.

Maybe briefly

1. Treatment process (from the stage where there is no gum?? bone (is that the correct expression?)) - duration of each stage
2. Time and cost for each process
3. Materials (substances) of implants

Is there anyone who can explain?

I'm curious because it seems like the price varies a lot depending on the material, but I can't easily do it here abroad because the material seems to be somewhat outdated, like an older material that was used before.