I am a young straight male. I might start with some of my male friends that feel comfortable. I know some of them are. Most of my female friends objected, lol. They were cool about it but I am not surprised. Most of my friends, male and female, aren't comfortable naked. I wouldn't dare ask too many of my friends because they might think I just want to see them naked. I haven't tried to look for models so hard because I have no portfolio to show.
I'm very comfortable with my body and I think I'm fairly good looking and moderately built. Perhaps if I start taking a figure drawing class and start modeling nude myself then I can find people who are comfortable with these types of things and go from there.