Go to a SEAK or CIME course. Not just for the impairment rating stuff (although that is very important), you need to know how to think like a lawyer and how to address issues like causality and relatability. You need to know the difference between reasonable degree of medical probability and reasonable degree of medical certainty.
Are all your referrals going to be coming from this one attorney? Will you be ok (and will he/she) telling them what they don't want to hear? You want your reputation to be that of a neutral party. Sometimes supporting the plaintiff, and sometimes the defense.
Have you been deposed yet? Because that is a big part of it.
What kind of cases are these? Personal injury is very different from work comp. And med-mal is even more.
I do a fair amount of medicolegal work. I try to avoid med-mal cases but occasionally do them, but NEVER where the defendant is a local doc (for either side) because you don't want to s*** where you eat. Most of my cases are work comp, with some auto/personal injury. Once you get involved in the deposition/testimony part of things, it can get very stressful (and very lucrative)
Also need to make sure that you NEVER provide medical treatment or advice to the injured party. You examine them and take a history, but it is only evaluative. Once you give them any medical advice, you are establishing a doctor/patient relationship with them and are subject to torts. If you are only evaluating in preparation for expert witness testimony, you are not subject to torts (and these evaluations are not covered by your med mal policy)