As many have said, there aren't any guarantees. But here is something somebody said to me many years ago, which helped a total newbie:
Storms at sea are scary to consider. But imagine a bottle, with the top firmly on, in a storm. Is it going to sink? Would a bottle be at significant risk of sinking, or would it just get tossed around a bit?
In a bad storm, a well-designed boat all closed up is like that bottle. It is *very* tough to sink (in fact, many sailors simply wait out bad storms below - probably a bit scared and shaken up, but safe and dry). Now she may take a beating she may not come out of it so pretty - but like the bottle, there is no reason why she should sink.
Oh, yeah - and with modern communications and forecasting (assuming you aren't on a schedule) most people avoid storms entirely :-)
Go sail. You'll be risking more on driving to and from the boat.