In my experience it has been necessary to first build relationships with other Irish learners before getting people to agree to do phone or Skype calls together. I have been attending DnG events for the past year and it was at the most recent one that it finally seemed appropriate to ask people if they would like to do this. Before that I would have maybe one conversation in Irish every 2 or 3 weeks. Now I have a couple every week. I think your goal is correct. Just don’t take it personally, or get discouraged if people you’ve never met don’t seem eager to make arrangements with you. With time, persistence and patience you may build the relationships you want.