Replying to I'm a super noob and I have some questions

Hello Internet,


   I have ski'd  a total of 5 time in my entire life and I want to buy some twin tips.  I know nothing of ski technology nor how to buy them.  I am going to put a description of myself below and how I want to ski and I am hoping you guys can help.

Me:

Height: 6' 1"
Weight: 235lbs
Skiing ability:  Like I said I have had little exposure, but I have been inline skating ("aggressive skating")  for 20 years.  I believe that there is a decent amount of cross over with balance and what not and the times I have ski'd have been pretty successful, I \even did a little rail. I've also been snowboarding for a long time so I feel comfortable on snow.

How I want to ski:  I want to spend a good amount of time in the park, maybe even ride some street.  However I also need to take obligatory full mountain runs with friends who don't freestyle and I don't want to hate my time doing so.

What I want to know:
 
What to look for in a ski?
What Size Ski should I be getting?
Any video suggestions to get into freestyle skiing?


Thanks,

Inglorious_Fart