TailTwister,
That sounds like a great start for a newbie and the first day out. You didn't mention engine problems, lift off problems, etc.....

First off yes all helis will drift left. The tail rotor pushes them that direction. That is why full scale helis lean right in a hover and yours will too. Just keep adding right trim till it quits pulling that direction.

The tail rotor will feel twitchy at first but you will adapt. Try to learn to fly it this way. It will help you when you get into aerobatics. But, what is most important is that you learn to dial in the helicopter to respond to your liking.

Were the blades in track and did you notice ANY shakes or vibrations? I properly running helicopter will not shake or vibrate.

Also, the Venture needs +11 degrees on the bench to get decent performance. You are not ready for that but your pitch settings in Normal mode should be some +11 and -1. Set the hover point where you like. Some like midstick some choose to learn 3/4 stick from the start. It's up to you. But, if you have midstick set at 5 degrees and your stick is not at midstick when hovering then your setup is off. So, try to adjust your throttle curve to give you a good headspeed and your hovering is at midstick(if that is what you are set at).