First and foremost you should be looking at the livability of any well built boat you are thinking of buying. Very few folks sail even 10% of the time, but if they live aboard they do that 100% of the time.
There are some boat manufacturers that are much more interested in their bottom line than the safety of the folks who sail their boat, or just plain do not design or build some boats in their lines for offshore sailing. Often this is a matter of personal choice, but if you read through old threads you will soon get an impression of which the members prefer for offshore sailing and those the majority do not.
Generally, it is not a good idea to purchase a boat larger than a dinghy before you have some sailing experience under your belt, on as many different boats as you can. How can you choose wisely if you know nothing of the subject?
I completely disagree with the posting above about needing strength to sail. Almost everything we do aboard our boats is aided by mechanical advantage and equipment that is designed to minimize the physical strength needed. If you think about it, what difference would strength make when manhandling my 77,000 pound boat, which I have singlehanded? I'd best be using leverage and mechanical advantage whether I'm 21 or 71, or I am going to injure myself.
Some go for sailing lessons, but I'd recommend you begin this adventure by walking the docks in your area and working your way aboard other people's boats for day sails. This is most easily accomplished by being there when the boats come in after sailing and offering to help clean and put the boat to bed.
You might want to pick up a copy of Royce's Sailing Illustrated as a basic primer. It covers just about everything one needs to know to safely handle a small craft in a fun, yet comprehensive format. From anchoring to boat nomenclature and even splicing, it's got most of what you'll need for getting started, yet is still a good reference book for the most experienced of us. No preachy tome here.
The sailing is the easy part! It ain't rocket science, humans have been doing it for eons. It's the maintenance and repairs on the boat that take the time and expertise, or a big bank account to pay someone to do it for you. So be prepared to become a rigger, electrician, plumber, engineer, mechanic and refrigeration tech, plus a whole lot more.