a patient and encouraging sub who will work with you?

I'm new to this too but luckily my sub is exceptionally
courteous of me and is has subbed before so he's
understanding when I ask questions or if I'm not perfect. My
suggestion would be to go to the training day scene on the
scenes to play page and if your problem is nerves bind his
eyes so he cant see and gag him so he can't talk and maybe
so something silly and take away the mood not meaning to
and ruin your concentration. Eventually when you get more
comfortable with your role remove the gage but not the eye
binding and if he does say something that shakes your
confidence make him suffer for it, command him on what he
can say. Don't let him turn something you want to be serious
and sensual into light banter time, it's YOUR time. And don't
let yourself trick you into doing that either. Keep in mind that
you are in charge and it's your world that HE'S entered. Also
have music playing in the background and low lights. It's so
much easier to stay in scene with an appropriate background
and music to guide your confidence and mood.

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Quit bitching, you know you like it.