<human>: Could you distill the essence of the text into 1-3 sentences?

Ok so here's the deal, my parents are divorce.  Mom got me in the custody battle, after a couple years left me with my maternal grandmother for most of my childhood suffered severe emotional neglect and abuse.  Years later Mom came back and it was double the emotional neglect and abuse.

Now I got kicked out of that house and am living with my dad, things are ideal but my stepmom is old school Taiwanese parenting and this doesn't roll with me.  I'm more lax and willing to talk out, ready to remediate the problem before it gets worse while she's believes in smacking the problem away.  This clashes with how she's parenting my younger half sister because I know for a fact that this type of parenting does not work.  Both Dad and Stepmom work constantly, so I'm with her most of the time, cooking, cleaning, helping with HW and projects.  

The problem is, I don't know what parenting actually is.  I don't know what **good** parenting looks like.  I know what it's not suppose to look like.  When my sister has bad grades or emotional problems, I let her talk it out with me or if it's grades, I assign her worksheets focusing on what she doesn't understand/got wrong.  

However, I do find myself slipping up sometimes.  Sometimes when I'm being stressed out by school or just from emotional turmoil I find myself yelling at her for the smallest things or just being constantly frustrated at her, I never resort to violence, but at the same time I know that words run deeper than wounds do.  A lot of times I'll calm down and tell her what's been going on with me to cause this but at the same time I don't think an apology is enough.

I'm just terrified that my sister is going to end up with emotional scars like I had, I don't want this to become a cycle of abuse but at the same time I don't know where to stop.  I don't know what's disciplining and abuse because in my mind they go one in the same.  I was so isolated as a child I didn't know that there better ways of parenting.
<bot>: Former abuse victim is co-parenting younger sibling, worried about what draws the line between discipline and abuse.  Doesn't know what good parenting looks like because has never experienced/seen it before.