<human>: Hi! 

I used to work at a restaurant as a server. This particular restaurant was very team-based. I loved the job, but my coworkers/managers and me didn't click very well. I ended up resigning after about 3 months as I couldn't deal with staying there. Before I left, they told me that they didn't think that I was open with them and that I was immature. Before I left, I tried to change myself as much as I could to fit what they wanted, but they kept telling me that I was doing it wrong, and not being helpful as to what I was doing wrong. An example of why they thought I wasn't open was when I made a mistake, I would try to fix it myself, and then I would look back and try to figure out why I made the mistake, and how not to do it again, whereas they wanted me to verbalize it to them. I'm not a particularly open person about my life and my mistakes, but I've never had an issue like this before. I got another job offer, and I'm worried that it will happen again.

What I'm looking for is suggestions on how to be more mature, more open and more easy to get along with in a work setting. I've tried looking up self-help books, but I don't know which ones are good. I can't afford a psychiatrist right now. I know that I can be pretty stubborn as well, so any help with that would also be very appreciated!

Thanks in advance!! :)

Summarize the given text in a few sentences.
<bot>: Old coworkers/managers at serving job said I was difficult to work with, not open and immature. Don't want to repeat this at new job, and looking for suggestions. Thanks :)