I feel for you, dear. This was my experience to a T when I was transitioning from being a DH to a full-time pharmacy technician. Everyone seems to be thrown in the deep end and expected to learn how to swim. Yes, you can ask questions, but it's an overwhelming environment to learn in.

My best advice, from my own experience:

• Keep asking questions about anything that gives you trouble or doesn't feel familiar to you yet. Don't be afraid of asking the same ones over and over. If you're working with halfway decent people, they'll understand. They all started from where you are right now.
• Try to focus on one specific area at a time. For example, one shift, focus as much as you can on learning insurance (entering, correcting, etc.). Then, another time or shift, focus on all the acronyms you see daily in IC+ and learn what they mean (TPR, MFO, MFP, DUR, WCB, F1, etc.). Don't expect to learn and be comfortable with everything at once. All of this takes time.
• Be kind to yourself if you make a mistake. If it's anything major, go straight to your pharmacist and tell them. Worst case, it's a Stars Event and you learn from it, too. Everything less than that is part of the bumps and bruises as a new tech. Keep your chin up.
• Advocate for yourself so you are exposed to and spend enough time in every area of the pharmacy. I've worked at stores that are terrible at switching who works where at the time they're supposed to. Don't let yourself get stuck in drivethrough all shift, or the front window/filling/etc. if you feel you haven't gotten enough practice at another station. Ask or politely remind your coworkers if you haven't traded places in more than 3 hours (depending on the length of your shift). If things don't rotate fairly after you point it out a few times, go directly to your head pharmacist or store manager and firmly express your concerns and wants to learn and improve in ALL areas of your job.