No one has ever heard of Range vs. Range, so no one has ever asked a question. If you have a question, you can either email me at firstname.lastname@example.org, or post to the Range vs. Range subreddit: www.reddit.com/r/rangevsrange.
Once you've logged in with your Google account, you can join an open game. The list of training situations is very small right now, but more will come soon. The logged in page will show you open games you can join, your running games, and your finished games.
When it is your turn, your game page will have a 'Range Editor' button. On the range editor page, you can do the rest. The range editor shows your current range. You just have to decide which hands you want to fold, which hands you want to call (or check), which hands you want to raise (or bet), and the size of your raise. To start with, all your hands are unallocated. You just have to select some hands, move them to one of your other ranges, and repeat until you've allocated all of your current range. Then enter a bet size and click 'Done'.
The simplest way is to click the rank combinations you want to select. To select multiple rank combos such as 'A5s+', hold down Ctrl and click the 'A5s' button. There is also a bunch of suit buttons. Normally, all suit combos are selected, which means that if you move some rank combo, all suit variations will be moved. If you want to move only specific suit combos, click the 'None' button above the suits, then click to select the specific suit combos you want to move. Try it!
Only if someone does not make a move in any of their games for seven days will they time out, and they will then fold their whole range in all their games.