i created an AI Modell (have like 20+ very similar face photos of my dream model) created with "Fooocus" Juggernaut XL SDXL)... what is the best way to creat m

i created an AI Modell (have like 20+ very similar face photos of my dream model) created with "Fooocus" Juggernaut XL SDXL)... what is the best way to creat myself an "Modell" or "checkpoint" of my wished modell face? i find tutorials but they seem complicated and outdated. thanks for any small tipp what things to research for actually method. Thanks