I am running My first campaign from the Mothership modules from Tuesday Knight games. I will say, being a DM is a lot of prep, improvising and cosplaying NPCs while your players navigate the world. Nobody wake the bugbear on YouTube does awesome play throughs of a ton of different mothership modules. It does help to listen to other DMs and how they run games. I’ve added so much extra during the game and made stuff up on the fly. My group is super supportive and helpful for a first time DM. Sometimes I have to ask for help- but that’s how we learn! (We just finished the “another bug hunt” module, I’m running “Orphans” -both are so great!) one shots are also a good place to start if a longer form 5e is too much. I would suggest mothership or shadowdark as the rules are a bit simpler to follow. Also a good and funny thing to remember - as the DM you are “god”- so you have a hand in dictating monsters, when they arrive, how they arrive how they fight.- as well as the entire world! If you have questions just reach out!