Starting a challenge without knowing the goal it’s pointless, unless you can add the theme later, but yes, if you want to do it, you can still prepare yourself some material, but remember this 2 hours won’t give you a super advantage, since we all start without a theme until we wait for the actual theme, so, we can altogether do the hunting for the resources and when the theme is up, we make it happen
Edit: Theme is up finally Speed it up, Slow it Down.