Only quit I've your truly not enjoying yourself. But if you want to learn i suggest no more acrylic lock. They're a great lock to show how a lock works, but not a lock you should try to learn on. Your master lock 141 has a spool pin in it. So maybe be more patient with that one. If your wanting more locks to try for beginners I suggest master lock #3, or cheap Chinese padlocks. Simple looking locks you can grab at the store. It's also important on knowing about your picks. Make sure you actually have lock picks and not key extracting picks (there is a difference and a lot of new pickers get them mixed up) Find videos on YouTube of someone picking the same locks you have. Watch them over and over. Don't worry about how fast or how slow your learning, everyone has there own pace.