I have never used it from the twitter side of things hon, only instagram - but you could still achieve the same result as I do with Twitter - as I mentioned to kaerpediem just now, What I do with relatively extensive posts like this one is I publish the intro paragraph and header image from instagram... and then just edit it on Steemit afterward. But the shorter posts I simply do as is on Instagram.
I don't think there are any tutorials as such - what sort of info would you be wanting to find out? Perhaps I can assist you?
I don't know exactly lol. This is just not clicking for me. I will edit here like you say and that will work for most of my problem I am sure. I was thinking other people were doing this before it got to steem. I might make post about the steps I take to see if I am doing something that could be improved. Thanks so much for your help :)