https://www.youtube.com/watch?v=Xr-NJH_Nh5w&t=98s

I'm 18 years old. I have a slightly, but not extremely, recessed face and never had orthotropic or orthodontic devices. I don't know exactly how to describe it but my mandible is slightly recessed and other than that I have barely any forward growth. I am just seeking maximum pleasant forward facial growth and to fix my teeth. I was considering buying one of these because there's a website that just sells them. However, there's no good explanation anywhere of how to use this device, or if it requires another oral device of some kind. I saw an old thread on here about the BOW, but it delved into different devices and other things and it got so complicated that  I could not understand it. If there's something or some facepuller like this but better (device or combination of them for sale online or from an orthotropic office only), could I be pointed towards it? I heard someone say this might be useful combined with MSE. I apologize because I am relatively new to this subject and it is my first time posting. I hope I have given enough information and if I haven't I will try to give more as I can. Thank you.