Creativity support tools help learners undertake creative work, such as facilitating coaching by creative professionals. How might we design creativity support tools that increase learners' access to coaching by creative professionals? This study took place in an extracurricular projectbased learning program where students were co-located, and met professional coaches face-to-face once a week but otherwise communicated online. To test an online creativity support tool called the Loft and investigate coach-student communication we collected data from 47 interviews, online log data and field observations. We found that (a) explicit help-seeking was rare outside of meetings, (b) help from professionals was highly-valued but not sought out, and (c) online systems could surface learner struggles and trigger help-giving. Our findings suggested that online creativity platforms can support professional coaching through: (1) structured virtual updates (2) coach thanking, (3) Computer-Supported Group Critique, (4) disclosure of expertise, and (5) help-seeking training.