Advise for a budding new dom/sub relationship

Hello there, To get into the meat and potatoes I have dipped in BDSM for a while but couldn’t find a partner that actually fit with me. Fast forward I found a lovely woman, not planning on including BDSM( lifestyle) but in a random event we found out we both had a similar situation. She was in the lifestyle but left after her Dom got abusive. As for my question does anyone on here have advise on maintaining a sub that was with an abusive Dom but now wants to be a sub for a Dom she trusts (ie me). I don’t want to trigger any of the bad parts she experienced but still enjoy the lifestyle.