How do you think you would cope if you had clients who weren't like you and didn't respond like you to what you went through? For example, who returned to a relationship or weren't ready to face what was happening? Or had children and exposed them to similar situations you were as a child?
Some people with experience of DV can make brilliant IDVAs and some don't. In some of those latter cases because they compare all the abuse they come across professionally to their own experiences and write off anything that doesn't match what happened to them as "not abuse" or "not serious", which is dangerous. Or because they flounder when faced with people who aren't like them in how they're affected or how they cope.
It could also bring up a lot of old distress for you. Do you have support around you? How do you think you'd cope? Would you be able to switch off if you were worried about someone? Or if someone had disclosed something really harrowing to you? Would you be comfortable keeping people at arm's length boundaries wise?
It's wonderful you want to help others in this way, just be cautious that you aren't blinded by idealism.