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You have to click 'wallet' and then 'permissions' and then the little button on the right side that says show private key.

The key should start with a 5.

Thanks to you, I managed to do it, and thanks to you, I learned about this very good idea for a youtube alternative. Now Steemit starts to show promise, but it has many glaring flaws, which make me doubt that it will exist a few years from now.
I will remember Steemit as a very good idea which failed to deliver due to negligence of some critical details.
As a concept, it is great.

Glad I could help.

Who knows where it will go in the future. It may be just an early version of something that will soon be taken over by something better. Or maybe the development will ramp up and it can improve enough to take over facebook. At the speed we are headed now, probably not the latter.

In this spirit, I suggest you should check @elfspice , @ l0k1 and @calibrae posts.
I am opposed to around 1/2 of his ideas, perhaps more, but I decided to give his calibr.ae shot a try.
I doubt that it will be any better than Steemit, and it may very well be worse, but if you want to join it, check his posts and this post is at least where initially you could ask to join:
https://steemit.com/calibrae/@elfspice/call-for-interest-in-calibrae-beta-vote-on-this-post-to-be-counted

Notice! I do not recommend it to you. Protect yourself at all times, and be very suspicious.
I only brought it to your attention.
I may have to do a fork myself to make something good, and despite passing a few programming courses years ago at the University, I lack the skills, knowledge, experience, and dedication.

I've been following it a bit, but I'll wait until it progresses some more before I join. Thanks for the info, though.