Hello,
I do have 5 years of experience with java (in particular with rest api) development, I’m a certified scrum master and product owner, and I believe I can help you.
I've been leading my team of 10 developers for 2 years, serving the as well as scrum master, handling the agile ceremonies (daily standup, plannings, groomings and retrospectives) during our 2 weeks sprints.
I can coach you about the retrospectives, giving you some examples and even tasks to perform during the meeting (not only the "boring" comparison of what went well and what didn't).
I hope to hear you soon!