Good morning! I downloaded the Grok Tiddly Wiki html as per the instructions, then made a Tiddly Host account (I organize all of my classes in archives after each semester and a link seems so much cleaner than an app, to me.) and created a blank tiddly,
https://ivan-popov-grok.tiddlyhost.com/ which I then drag+dropped the html of grok into (yay it worked! I think) at which time the import sequence came up, gave some warning about overwriting core files and system instability, ignored that and drove it home, and now it seems to be set up for going through the exercises and readings. I finished the getting started / setup tiddly, closed that out, got to my control panel area and saw all of those settings, customized my pallete to spartan night, and edited my toolbars to things I think I would use, especially getting the control panel icon on to the main sidebar instead of hidden inside "view more" and am working through the rest of section 1.