It's crucial to establish good relationships with the local legal community.
Connect with progressive legal organisations, as well as public defenders. Also, if you don't already have ties in the local legal community, ask local activists which lawyers might be interested and who can help the legal team network.
Arrange a group meeting with all the lawyers who are interested and all members of the legal support team.
Lawyers are usually busy, so the earlier you can let them know what kind of help you will need, the better.
Make sure everyone's commitments are clear so that you know what to expect and they don't feel put out. Don't expect lawyers to come to every meeting or training, but let them know what is happening and that they are welcome to come.
Communication is key. Be friendly and respectful and make them a part of your team.