Sounds familiar. I exited what turned out to be a horribly manipulative, toxic relationship and six month later met a really lovely, kind person (who I've been dating for a year now). I think you're on the right path. I communicated early on what my issues might be and she understood and worked with it. It takes time to get over the defensive posture that you have to adopt in a negative relationship but if you've picked a good 'un, she'll appreciate your honesty and support you. I've had a year of not being manipulated, accused of lying, accused of having an affair with a lesbian, gaslit, taken advantage of and it's glorious.
It's not always easy to quiet the negative voice that pops up every once in a while but keep up the communication and enjoy your new found relationship.