Improving the reliability and accuracy of voice control?

Hello all,
Throughout the last month or two I have been using voice control quite a bit and finding it very useful. I am wondering if the best way to improve recognition. Some of my questions are, is the correction box accessible? If you would like to correct a word is there a way to get alternatives? Does this improve you recognition, like does it take your corrections into account and use that to improve itself?
I have made a voice profile with live speech and from my understanding this well also improve my recognition. I realize over the span of a few weeks that my dictation Quality improved when I had my phone case off, so in an effort to make sure I always have the best Recognition I am no longer using a case.
Is it worth re-recording my voice profile now that I am not using the case? Do you think there is a possibility this could even slightly improve my recognition?
I am interested in any tips on how to improve Recognition.
Thanks everybody