Welcome Iseenow. I'm also from UK.
Thanks for joining and posting. My advice, for what it is worth, is please don't do what I did. Don't just drift along putting your doubts to the back of your mind. One day they will come back with a pent up vengeance.
I, too, had many questions when I was your age which I was given non satisfactory answers to, by the elders. I just thought to myself, ''Ah well, my family and friends are all Witnesses, I'll just carry on''. I wanted to eventually get married and so had to go through the baptism.
Get baptized, get married, have kids. All the time still attending meetings. But deep down not believing a single solitary word of it.
Eventually I cracked and left.
Luckily for me, my wife and children have left too. Imagine the heartache, though, of those whose partners and children do not leave.
You can still ask questions now, of course, because you're not baptized. If you do get baptized you cannot question anything. Or at least you cannot question the answers you are given.