Sounds like you're being super healthy, so I don't think there's anything else you could possibly do physically. As pp said, there's no evidence for coq-10 (I'm also a health/science background) but equally nothing to suggest it does harm, so your call. But there's a lot of pressure out there to do things to improve your chances based on no reliable evidence, and then people beating themselves up thinking oh if only I'd tried....
It sounds like emotionally is where you can best look after yourself. It really isn't a scary process. Injections are a bit eep the first time (or a bit blah if you have blood thinners post ET) but you'll be doing them in your sleep soon enough. The needles are tiny for abdomen jabs. (Post ET, we also had big IM needles that went in my back and I genuinely could not feel them at all).
What we did find is that it was pretty overwhelming the first time (there is so much information and so many procedures/scans/tests). And exhausting (all those trips to the clinic, juggling work, plus the drugs).
My advice would be to not try to do too much else while you're going through it, except for lovely fun things that don't tire you out too much but do help you feel like life isn't only about ICSI. Trying to make a baby is something very important you are doing at the moment, but it's not the only important thing in your life and it doesn't define you. Agree about planning holidays/breaks if it doesn't work, or between parts of the cycles if you can.
Statistically it might well not work the first time. You have no way of knowing. But it's not a failure on your part if it doesn't happen the first go. Sometimes it takes time to figure out the best medication regimen or other things that might help. The more you pin everything on it working go number one, the harder it will be if it doesn't. It's such a difficult balance as you can't go in thinking there's no point to this, because it's an exhausting chuffing process and frankly you wouldn't bother if you felt like that. But for us, trying to have a bit of a balanced and philosophical approach really helped.
Wish you the best of luck x