It’s a great idea to do a “dry run” with co-workers or even your family if permitted. Have them ask questions you may anticipate, or if they have any questions. Choose the most brutally honest co-worker to throw you some questions or concerns, also ask them what they liked about the presentation.
Take a public speaking class and join a meetup group Chances are you’re not the only person that is interested in personal and professional growth. Classes and groups provide a great opportunity to brainstorm with other professionals groups will often provide you with a wealth of networking opportunities and are localized and even specialized, so you can discuss any matters relevant to the area you work in.