Do you just have a general idea/outline of the person/object behind you/wherever you imagine them to be, or do you imagine every little thing about them?

I've summoned a lot of people but I think I get too hung up on imagining every little detail about them, is it just enough to go "my crush is behind me" and leave the rest up to my brain? Will my brain just make them be there behind me looking as like the person as possible? Or do I need to really focus on what they look like for it to work?

Also, once I've summoned someone, I still don't feel like they are really there, like if I try to kiss the person I like, nothing happens, I can't feel anything if you know what I mean. Any tips for this? I try to focus on touching them but it doesn't help! Thanks.