Hi,
As you are new here, you probably haven't found all the posts that say things like "dont pick your apartment door, especially if it is master keyed, because it can break the lock and the landlord may not give you your deposit back, or the least you have some explaining to do" The lock may be on *your* apartment, but it probably isn't your lock to be picking on.
here's a graphic I made a long time ago to illustrate this issue:

Resist the urge to practice on your own door, it is a lock you rely on for safety and security. It would be bad if it got messed up and you coulnt lock up when leaving for the day, or wouldn't unlock in case of a fire/flood/maintenance emergency or something.
Buy a deadbolt for $10-$15 at Walmart or Home Depot, Brinks and Defiant are good ones to start on, and practice picking on them instead, plus you get to sit on the couch and do it, and not crouch in front of your door looking suspicious.
Also, your lock is not that old, just beat up. available at Home Depot for $40.
What picks did you order?
Squelchtone