I would make two to three tensioners of different widths. One may fit in the top of a certain lock while another will not. I would also try to make them at least 8cm long starting out. I had problems when I began lockpicking that stemmed from me using tensioners than were too short. Learning to use the tensioner well will be
as important as learning to feel pins and press them up. That's not an exaggeration IMO.
I would rather have four different, quality hooks than all the rakes, halfsnowmen, double sides balls, etc in the world (exaggeration). You can single pin pick (SPP) almost every lock that you will come across. A shorter hook and a slightly deeper hook and a narrower shorter hook will always be a wonderful asset.
Wafer tumbler locks (the kind on your desk more than likely) are not as much fun as pin tumbler locks (the kind on your front door more than likely) IMO. Wafer tumbler locks can be frustrating and stubborn sometimes and the wafers may not clearly set to a beginner. I think a cheap pin tumbler is much better. That being said, don't pick your house lock. Picking a lock can break it. I've done it.
Your best bet right now will be to go to WalMart and buy a $10 Kwikset deadbolt. Learn to disassemble and reassemble it. Go through digitalblue (db)'s guide for beginners. It really is the best way to start.
viewtopic.php?t=10677 is a link to that beginner's guide.
It takes a while to learn how to "feel" the inside of the lock. Practice until you are frustrated, then practice some more later. Keep at it and read everything you can at LP101. Use the search function heavily, read all the "Stickys", and don't be afraid to ask questions.
You will improve quickly with dilligence. Post pictures of your picks next to something of a reference size (a quarter or a ruler or something) so we can see their size and shape.
One more thing... if I were you, I would immediately invest in a SouthOrd small hook and tensioner. They'll help you make better picks on your own in the future. I recommend these two (they are uber cheap and they'll sell to anyone):
<the short hook: SP-09>
http://www.southord.com/catalog.asp?cat ... owstart=70
-and-
<the long twist-flex: TW-03>
http://www.southord.com/catalog.asp?cat ... owstart=20
Good luck!
em