Almost all of the comments above are pretty much spot on. My advice is to keep control while learning to see if you really want to do this. Start off slooowwwwwly. Do not expect too much at the start. One or two hours a day for a week, then add an hour a day each week. Do not only concentrate on how it feels, but learn also how it effects you emotionally and how you handle all the problems listed at the first post.
Yours and my circumstances are different. You are doing this alone so you need to see how you feel. And don't forget to imagine what it would be like if you give up the control to someone else. Since you don't really have a loving partner that understands you, I strongly recommend that you do keep it secret as to what you are doing. Long before you give the keys up, all doubts as to whether you really want to do this should be eradicated.
Finally, from my perspective, if you ever do find a keyholder, make sure they understand what it is you want. The keyholders wishes and wants for you, should be irrelevant. And if you ever show any unhappiness about it they should not hesitate to return your keys. If you even think they wouldn't then never part with your keys.
In the end a chastity device is an incredibly potent tool to effect your mental well being. It is too dangerous to put its power into the hands of someone you can't trust absolutely that your happiness and well being is the most important thing they care about.
In the end, you should only wear a chastity device if it makes you happy. No other person's opinion is relevant!