This is a worthy endeavor. Trust in a relationship, once lost, can be difficult to gain back. You may be held accountable for mistakes made years, even decades ago. But it is possible to forge strong new connections from the rubble.
Maintain that relationship: follow up and follow through. You aren’t going to be able to keep a zillion relationships thriving at a time, but you can set expectations. What do you intend to do with the relationship? When can they expect to hear from you? What are the next steps for connecting and who is responsible for initiating it?