Based on my experience, Kalley gave you the best answer.
I've posted before that I've had 3-4 careers, not doing the CNA thing until my 50's and have done over 100 interviews, easily, in different businesses.
I cannot stress enough that you need to practice the interview questions
--- yeah, talk to yourself and answer yourself
. Based on your question, it sounds like you realize this.
It's very difficult for most people to 'boast' about what they are good at and admit what they're poor at (or not as good as they would like). You need to be able to look at the interviewer in the eyes (no looking up/down or averting) and show you're giving a true answer, not formulated. A good interviewer can spot body language.
Confrontation questions are common. Be aware that if asked something to the effect of: "What do you do if a nurse loudly complains about you in front of a resident and/or their family?" (correct answer for the interviewer is to not say anything at that time unless the confrontation continues and then you politely ask that it can be discussed privately, later and leave the area).
(Real answer is that you're going to use your gait belt as a torture device :angryfire).
Anyway, you need to be honest about strengths and weaknesses and be prepared for these questions --- they can make most of us uncomfortable and you want to be ready for them.