Well an update,
I ended up working the bases in a hs scrimmage today. My partner was great and extremely helpful. Being a scrimmage, we met w wry half inning for the first half of the game. I think I got all my calls correct though i often started to break in the wrong direction, especially from C.
I got caught at third in a run down when I should have followed the BR into second. It was runners on second and third, one out. A weak shot to the hole at 3rd. I thought PU would stay home incase the throw came there and it did. But the runner on second got caught between. Fortunately there was no throw back to second.
The game has a funny way of finding you, especially when you are new. Top 3, runner on 3rd, two outs. Speedy BR hits a shot to second. Runner on 3rd breaks for home. Throw comes in and it's an banger. I paused and made the call strongly and I repeated it, safe. I think I got it right but it was really close.
All in all, I feel pretty good about my first umpiring experience. Thanks for the tips and pointers!