You are very Welcome! Cool.. 4 weeks is short but it is still good because you know you have someone to ask. Some facilities will just give you 4 days and that's it.You are still blessed!
I agree with Daisy, learn things everyday and one at a time. We will never learn everything. The best thing you can do is to develop strong relationship with your mentors and other health care workers. You will learn from everyone. From patients, CNA's to MD's etc.
ASK questions and take down NOTES, learn the best practices from every person you encounter and DOUBLE or TRIPLE CHECK the MAR and the TAR always. NEVER hesitate to ASK questions. There's no RIGHT or WRONG question(s), or DUMB question(s) as long as you learn.
When you get home, review what you learned or watch a video or read something about it. Be hungry to learn everyday even just for 1 thing.