What are some of the best positions one should attempt at with the provider if he's a newbie with sex?

but lord knows there are many, many positions that are safe and easy.

Talk to the gal and see what she suggests.  Some gals are better at some than others, and will treat you to their specialty.

How new are we talking?

If it's a FTE for absolutely everything, take it slow and cover the classics: mish, CG, and doggie.

If by "newbie", you mean that nothing adventurous has been done yet, well then I suppose that depends on what the desired adventure is, doesn't it?

If you're still unsure, tell her you'd like her to take charge. She may just rock your world.

the last provider I saw asked me to lay down on the bed, and then she proceeded to use my body to her delight for the next hour. It was an amazing blur of things I didn't know I could do or would like.

don't worry. normally they dictate the pace.

Dogie Mish, Cow Girl(my favorate).  This is only reason I see well reviewed ladies, I learn so much from them

open wallet position works well. Then you both will relax.

I suggest that you can't go wrong with the Mish and the Doggie...