How to accept criticism and not be scared of any managers or families?

I’m not exactly sure what you’re asking, but here goes...

First and foremost, know the policies and procedures of your facility. Secondly, take care of your patients in a manner that coincides with those policies.

If you are told that you’ve done something not in line with the facility’s practices, look at what they say you did, ask yourself if you are guilty as charged, either own up to it, or deny it (whichever is TRUE). If you’re told that you need to improve in a specific area, accept it and try to improve.

If you are absolutely innocent of a situation, there are ways to be ‘defensive’, such as saying something like, “oh yes, I can see how you may have believed me to do XYZ; (here is where your side comes in): “But I couldn’t have done that because...”

As far as not letting people step all over you, as a new nurse, don’t listen to people who give you that kind of advise. You need to learn and until you’ve learned how to be a nurse and take care of your patients independently, don’t put yourself in a position to alienate anyone.

If the person advising you were referring to CNAs, that’s kinda-sorta different. But you can form allies with that bunch as well. That’ll have to come from a supportive management style rather than a dictatorship. Over time, you’ll learn when to be assertive or passive. Timing is everything, and experience takes time.

Your manager probably wants you to succeed. They hired you.

I am a manager myself, and that's absolutely true. If I hire you it's because I like you and think have potential. I'll do whatever it takes to help you along the way.

Give it time. Coming from a LTC point of view, I've made many mistakes and my managers and DoN always backed me up. They want you to succeed. If you have a question, ASK. Even if it's another floor nurse. That's what I do, and I've been a nurse for about 8 months now. Ask ask ask!!

Something that really helped me as a new grad who was super-anxious and self-conscious:

I know it's really counterintuitive, but whenever somebody offers you feedback, make a concerted effort to view it as "constructive criticism" and not just "criticism." When people correct us, our natural response is to feel dumb and get defensive. That mindset really isn't helpful, but you can take steps to overcome it.

As a new nurse, everybody knows that you're still learning, and that's totally OK--we've all been there. You'll probably make some minor mistakes, and that's normal. The only way you're going to realize you made a mistake in the first place is if somebody corrects you. When a manager or another nurse points out a mistake or an area for improvement, 90% of the time they're doing it because the want to help you, even if it doesn't feel good in the moment.

One of my manager's one told me that feedback is a gift, because that's how we learn and grow.

If you're not getting any feedback right now, then it's probably because you're doing just fine. However, try not to be afraid of feedback; we all have areas for improvement and can benefit from constructive criticism every so often.