If you google Snowdon deaths you'll see people manage to get into all sorts of trouble any time of year!
I am not an expert by any means, so I found this which is quite good advice from someone who appears to know;
Life in the Vertical: Snowdon: Winter Walks Safety Advice
Personally I've been up and down every track/path, mostly at Easter, the earliest being March. I did go to the top on New Years day 3 years running, once there was me and a party I met which included a mix of the Rangers and Rescue crews. If I hadn't met them I would have turned around, and we didn't see anyone else. The last year was sunny and clear so of course people with jeans and trainers were going to the top. Very, very silly.
I've done the Horseshoe on a summers day as a four with "experienced" walkers, two decided that despite reading all the guide books beforehand, and being very clear that once on Crib Goch you can carry along the ridge or go back, no other option, they were on hands and knees insisting on keep trying to find a way off from where we were on the ridge. There isn't one, so we eventually got off the ridge in the dark, and then still had a long walk to the car
But I've also done it when it was icy and clear with a good group and it was fab
Any wind at all though and you keep off.
You can camp in a field next to the pub which also did b&b. The Youth Hostel is at the bottom of the Pyg/Miners track.
Questions from the above link,
The first is if you have the right experience for it?
The second is do you have the right equipment for it?
The third is is it the right day for it?
Since you say you have little experience of this you probably can't say yes to the first or second, and the third depends on the forecast, and how you're feeling, on that morning.
Apart from the conditions its still a fair old climb!
Maybe start a bit smaller on something easier to get some experience, and even then keep in mind the top will still be there tomorrow