Hello and welcome to BOL! I'm originally from Elma and still have family in the area (brother and sister are also in East Aurora). I know Holiday Valley and have ridden there a bunch. With a smaller east coast hill like Holiday Valley, you definitely do not want to a big long GS board. I would suggest starting with an All Mountain board such as a Donek Axxess, Coiler AM, or Prior 4WD. I'm about the same size as you and my first hard boot board was a Donek Axxess 162. Tons of fun, a great board to learn carving on, and I still ride it.
Getting proper boots that fit well will be key. In addition to the links mentioned in previous posts (especially alpinecarving.com), also see the boot info here on Bomber, especially the sizing guide. It's critical that you measure your feet as indicated in the guide, rather than trying to use shoe size.
The last thing I'll mention is to do whatever you can to hook up with other carvers. I realize that might be difficult in WNY, but there is an awesome week-long carving event at the end of February at Stratton, VT: ECES. Not only will you find other carvers who can give pointers, but you'll find gear demos, including boots, boards, and bindings to try.
I haven't ridden at Holiday Valley in about 5 years or so, although my sister's in-laws are from Ellicottville and spend lots of time there. Someday, I'll have to get back there.