Rebbe explains that one initial spark is enough to reveal one’s core and mission. Since the writer has seen success in spreading Tanya, he should continue confidently, especially around Yud-Beis–Yud-Gimmel Tammuz. He encourages finding clear and illuminating words to inspire youth, noting that sincerity and effort, not perfection, are what matter.
https://www.torahrecordings.com/rebbe/igroskodesh/015/011/5597