Detailed help with entry door construction

I have a question about entry doors (specifically the details from start to finish). The one I have is poorly designed and made and I want to change it but I am not finding anything on here (yet) about door design (plans, sealing, hinges etc). I'm sure it's here, but I have not found it. Every time I put in searches I end up with hatch doors and not side or entry doors. Am I looking in the wrong place? Any help is welcome.
Thanks,
Doug and Mary
Thanks,
Doug and Mary