3 Daedric quests, 1` sidequests and 3 skill books read to Skyrim plat.
I have spent 114 hours in the game so far so I will have the plat in under 120 hours.
That is without using any guide except to find the starting location of a few Daedric quests ( I was missing like 7).
Getting the plat doesn't mean I will have done everything in game, there are still plenty of quests I haven't touched and I have only collected 4 Dragon priests masks for example and 36 dragon words out of 60...
Right now I am level 51, I might make 52 before getting the plat, depending on how long it takes...
I have maxed 3 skills to 100 ( enchanting, smithing and sneaking).
4th highest skill is lockpicking at 88, archery at 84 and then alchemy at 80.( I could max alchemy if I wanted but I am already OP as it is, no need to boost my weapons or armor anymore ( I have 433 armor in legendary nightingale armor, I could easily be over the 500 cap if I used better armor).. My legendary Daedric bow is doing close to 200 damage a pop ( sneaked x3 shot kills about everything in one shot except Draught deadthlords, dragons and a few dungeon bosses, sneaked backstab kills everything in one shot ( haven't tried to stab a dragon in a while so not sure about those)).