You don't have to be perfect at all. Just realise that there is a small window to edit your hashtags, with an additional seven days to make changes to the post itself before it's stuck on the blockchain.

Once again, I believe this manner promotes proofreading and thus increases general post quality, if people really want to get somewhere on here.

I've made quick fixes in posts shortly after publishing, and I've even removed posts by replacing them with content I decided was far better, hours after. You'll get used to it, and as time passes you'll probably see it the same way I do.