I started last year as well - not able to get out of the water in august - but have skied a lot since - so am probably a bit ahead in the learning curve having just run the course at a modest 30 mph and 15 off. Regardless, I can relate.
First off, I doubt the wet suit causes much of a difference at all. Nor the position of the attachment. That said, I can relate to your troubles with deep water starts. I would go 18 starts without a fail ... and then suddenly one day ... fail 4 in a row and be unable to get up. I think these streaks are natural as ones consistency evades them in the early going. What makes matters worse is after a few fails, fatigue sets in. Don't underestimate how fatigued you are ... and if you're like me ... you psych yourself out after a few fails and there's little hope for getting up again. I convinced myself to just "reset" after days like this and focus on the basics (head and shoulders out of water, knees to chest, straight arms, making sure ski tip stays out of the water etc etc) and not be too critical of myself. Easier said than done though. There's nothing more humiliating than failing a start - and until you're consistent, its hard to focus on the actual set when you're worried about not even getting up. Again ... I don't think what you're describing is all that uncommon. Just fight through it and one day things will click and you won't really think about starts again.
As for the wake crossing, you'll hear a million and one different words of advice on here - all of them good. I'm sure you'll hear mostly about getting into a great stack, which is valid. That nothing else matters until you have a good stack position. Again - this is true. But for me, my offside turn was so bad that I felt like I was never in a reasonable position to actually get into a good stack. I finished the turn leaning forward, and at that point the only way to get into good position was to overpower a 1800lb boat. Wasn't going to happen.
The last month my offside turn came a long long way. and what really did it for me was 2 things. Perhaps this will help.
1. Really focus on "finishing" the turn. Allowing my outside hip to ski all the way to my right hand before I "reached" for the handle.
2. I'm sure you've heard to really load the front foot. Especially for the offside. I heard this too ... and it always seemed a bit counter intuitive. I'd try ... but never really that much. Something in august clicked though, and I realized that on my offside, it's pretty much impossible for me to put TOO much weight on my front foot. I was always a bit worried about going over the front until then, but now that I really really really load the ski up, the ski just comes around on it's own. Once this happened, the ski came around and was pointed across course rather than down, the handle was at my hips, and I felt like a cannon ball being launched across the wakes. Oh, one other bit of advice wrt offside turn - or any turn for that matter. When you watch the pro's it always looks like they just snap the ski around. It happens so quickly. I'd always try to emulate this. And really force the turn. Instead of that, I just kind of let the ski arc around now. I can't force it to go any faster. It just needs to swing away from my core, following my hips back to the handle. One of those things that's hard to describe. But essentially I stopped thinking about forcing the ski to whip around, and thought of it more as following a path with my core as the pivot point. Oddly enough, when I stopped thinking of forcing a fast turn ... my turns became much smoother and faster.
Finally, the only other bit of advice that I have is ... that you'll hear a lot of advice on hear ... like what I've just shared. Most of it good. But ... what it really takes is just time on the water. If you're like me ... you'll take a step forward ... 2 back .... 3 forward ... 1 back ... etc etc. It's frustrating as heck. But there is really no substitute than just getting comfortable skiing and spending as many hours as humanly possible to help any element of your skiing - from start to wake crossing. So find that ski buddy!