First, you should look for an attorney local to the area where the case will be tried - that's usually best because they have to go to court often on the matter.
Second, your best bet may be to file a complaint with the Disciplinary Board for the state and see what, if anything, they state about the matter. That although they may find that he didn't violate the Professional Rules of conduct - that does not preclude a malpractice case necessarily.
However, if the Disciplinary Board does make a finding that he did violate the Professional Rules of conduct - that will go far in a malpractice case against the attorney.
Realize that the attorney directs any and all legal matters before the court. That although you may have wanted them to perform certain discovery - it would be the attorney's ultimate decision in the matter to send requests for discovery - and what type of discovery to send.
That if they attorney was unprepared for the case or didn't correctly notify you that your case would be adjourned or postponed - that certainly may be malpractice and maybe even a violation of the Professional Rules of Conduct on their part.
So, my advice to you would be to file a complaint with the Disciplinary Board first. You have two years within which to file a legal malpractice case. Then continue to look for local counsel to take on the case.