@Bionaraq - I've been there and really want to encourage you. Can be done. I started some good skiing at 6'3" and 370 after dropping from 455. Yes, seriously. I then dropped to 275, and am currently skiing very strong at 305. Lots of learning and it isn't easy, but last season I skied 106 times between April and October at that weight.
First - it is a much about the boat driver as it is about the skier with your physical dynamics. It should be a slowish drag and then when you are starting to plane - pop. I call it a hard gradual then pop kind of pull. When I'm in good ski shape it can be all pull, but that is the way you need to start. You definitely need a 71" ski. The Butterknife is good, or the Radar Session, or the Omni or Connely V or any of the wide ride skis. It is possible to do too wide. The Big Daddy, for example, you will be able to get up on, but it won't be nearly as fun to ski.
You will also want to make sure you are using Clincher gloves (I used the Masterline Pro Locks). I can't get up without them, period. This is a must. The handle is less of an issue for me as I seem to be able to use a variety of handles, but if you can't keep the ski straight, you'll want to start with the Help Me Up rope that has a bridal.
And even as a bigger guy, you can progress to a high performance ski. For me, I'm skiing on a Radar Lithium Senate 71 with a Reflex binding and and half binding in back. I'm also using a whisper fin with two wings on it after doing some reading about how that fin and wing set up helps bigger guys. I LOVE how the ski turns and bits and I can really get it to perform.
Honestly, I have no business skiing at my weight, but I love love love it. Nothing quite like it. Of course losing weight will, help - A LOT. Stay on your journey, you can do this. AND - you can ski at your weight. It will take the right driver and equipment, and a lot of will, but it can be done.
Good luck. PM me if you have any questions.