I cleaned up White Orchard in about seven hours, think I did everything. I do remember screenshots showing an elven archer that I thought was from White Orchard, but maybe it's from somewhere else because I never encountered her. White Orchard seems to mostly tell you were everything is anyway; it's a big prologue/tutorial really.
The game proper starts once you finally hit Valen, the first open world, and jesus fuck is it huge. There's so much content, and it's so expansive. In a good way, but you legitimately have to pause and think to yourself "okay...where do I want to start". It's so tempting to just go mad and ride around, but you know even doing that you're going to come across a ton of shit you'll want to stop and investigate.
EDIT: If people are finding the combat difficulty too hard/clumsy, or the difficulty above normal too difficult when it comes to healing, the best advice I can give is play it safe. Yes Geralt can do all fancy swivels and combos, but the price you pay for getting caught in an enemy's attack chain is not worth the loss of one extra hit should you chose to back off instead. The Griffon fight really personified this. Play carefully, don't be greedy. Use spells, bombs, and whatever else that could momentarily stun or stagger the opponent and land a blow or two, then immediately back off. Stay on the edge, not in the middle surrounded. First time fighting the Griffon I was shitty, because the combat does have some nuances I don't agree with; there's a really obvious delay in command->action in almost everything Geralt does, which is tedious with rolls and side steps. But much of this frustration is alleviated by being more careful and strategic in your combat. An instant frame perfect dodge is necessary when you're knee deep in shit and playing at a hundred miles per hour. Given the slight delays and fanciness in the combat, give yourself some room to breath. Avoid being in that position, greedily eating up a combo knowing the enemy will attack quickly and soon, when you know getting out of it will be hard. Patience.
The other thing; buy some essential skills early. Two jump out: in the combat tree at the very least buy the base ability to block arrows. Whenever you're going to fight human groups have it equipped and while you're blocking Geralt will automatically block arrows. The upgrade allows you to parry them back to opponents with the right timing, but the base ability is essential protection and will significantly reduce tedium in human groups. The other is a passive ability, I think it's called Sun and Stars. You'll (admittedly slowly) regenerate health during day, and adrenalin at night. If you're wandering around by day and don't want to eat up all your food supplies, having this ability equipped will passively heal you as you do what you do. Very, very useful.
EDIT 2: The reason I bring up combat tips is because while I think Wild Hunt can be improved (like most open world games), it's easy to fall into the trap of "this is too hard because it sucks" when that's not entirely true. Yes there might be some oddities, it might not flow as smoothly as other games, but if you learn the nuances and adjust your play style you will do better. You won't completely avoid moments of frustration but you'll severely reduce them and understand what the game is going for. Different =/= sucks, same as having to learn and adapt to a new style of combat. I had an immense amount of trouble with the Griffon fight first off, was *this close* to dropping down from Blood and Broken Bones difficulty, but once it all clicked and I understood how to play, as well as applied some patience to my strategy, I was able to land blows and avoid hits for lengthy entanglements and beat the beast with comfortable attentiveness.