I'm not really certain how it is on the XBox, but on the PC it's pretty simple. Hold in the LMB to charge a flourish, right click to use the AOE for spells or aim for the guns. We get hotkeys for F1 - F4 with the Potion, Food, Summon Potion and Time Potion. This was kind of annoying for me personally. I would have liked to rebound them to something else like 1 - 4 instead. I'm playing on my laptop, so I have the F keys, but I have to hold in the Function key as well which is at the bottom of the keyboard. So in the middle of battle it's annoying to have to stretch my hand across the keyboard to toss down a potion. We could rebind most other keys. I think there was options to rebind those ones but whenever I tried it said I couldn't, lol. The interact key is E. You do mostly anything by pressing or holding E. The hot keys in the sanctuary are also F1 - F4. Annoying for the same reason as above, but not as bad since I'm not rushing to drink a potion, hah.
Also, in the DLC they made the Bandit Camp functional now. So you can revisit it and sleep with their whores or play their shooting minigame and win a couple of badass guns. There's a rifle that has 3 unlockables and each one is the same. You gain money whenever you hit an enemy x3 if you unlock it all. Properly named "The Moneymaker". It's not powerful though. There's also a pistol which is the best in the game called "The Black Dragon". I forget its unlockables though. It's good though. As good as most rifles, but much faster. You just can't snipe anymore, not that you ever needed to though.