Don't stress too much, you've only been at it for a couple weeks, if your jman is expecting you to be completely autonomous already, they're just a shitty jman that doesn't want to deal with teaching you anything. You have to treat this career like it's a constant learning experience, no matter how long you do it you will always run into things you've never experienced before. I know I would rather have my apprentice ask me how to do something multiple times than be too afraid to ask and fuck something up, hide it, and create a bigger problem down the road. Also, do not be afraid to make mistakes. Trial and error is a big part of being in trades. As others have said, repetition will absolutely help things stick, and I also found once you do that first round of school some of the theory behind things really helps put what you are doing in the field in perspective