Link to all of the digited yearbooks. We have hard copies of these in the library if you want to walk through the past.
The Ojibwe People's Dictionary is a searchable, talking Ojibwe-English dictionary that features the voices of Ojibwe speakers.
While there are a lot of options for online American Sign Language Dictionaries, this one has a nice flow starting with the alphabet and moving to words then phrases. For a beginner, it is a good place to start.