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Go to 'wallet' then click on the little arrow to the right of STEEM, transfer 00.001 Steem to @suzi3d (if you don't have Steem you can use SBD) and if you don't have STEEM or SBD go ahead and join the Discord and ask someone to help you :)

Thank you, I’ll give it a go!

I’ve downloaded the Discord app and set up an account but I’m not able to join the server without an “instant invite” URL. And since I’m not on a server, I cannot ask any one on Discord.
What am I missing?

the invite link is in the above post - just ctrl-F "click" and you'll find it :)

Got it and done! Thanks!