Advice on planning a community of practice: consider the need; build a core team; develop community purpose and aims.
At this stage it is important to ascertain whether your community is needed, who your prospective "core" team might consist of, who your prospective members might be and develop a community charter. It is also important to consider how the organisation of your website or online tool will affect user experiences and participation. Ideally there will already be a group working together to solve problems and share ideas around the topic that can form the basis.
It is important as a first step to identify a clear purpose for your community and assess whether one is actually needed within your domain. This sense of purpose should be shared by all members and will help steer the community overall and ensure its future success and sustainability.
It is a good idea to become aware of relevant strategic drivers and imperatives in the subject area. This can help you decide if a community is, in fact, needed.
Developing a charter will help maintain focus, quickly describes your community's purpose and aims and, provides a useful reference for review and evaluation.