A number of years back when I took my first position that involved supervision responsibilities, I went to a one-day course offered by Fred Pryor Seminars called 'A Crash Course for the First-Time Manager or Supervisor' and found it really helpful, so if this is your first time supervising, I'd recommend checking that out (
https://www.pryor.com/training-seminars/crash-course-first-time-manager-supervisor/), or a similar course to get you started. Of course you can't learn everything in one day, but the good thing that it left me with was a very basic foundation on which to build those leadership skills and continue to grow. In my opinion, that is one of the most important qualities of a good leader - always continue to learn and develop yourself. Don't let yourself fall into the trap of thinking you have to have all the answers, and always challenge yourself to be willing to grow. Learn from your employees and listen to them openly, and don't be afraid to let them know when you're not sure about an answer. You will always gain their respect more by being honest than by having all of the right answers. Get to know who they are and what motivates them, and if you show that you genuinely care about them and want to support them, you will earn their loyalty. Congrats and good luck!