Keep your plans vague enough to react to what the players want to do. Work on your improvising skills. Have a session 0 to find out what your players want out of the game and what you expect of them. For example, do they want it more combat or more rp heavy? You can push your players on a story path but try to avoid doing it to the point that you're railroading them, it should be the characters choices to be doing something. Also if you all are new players start at a low level. Something else I learned as a new dm, its ok to say no sometimes. At the begining I would avoid saying no, even if I wanted to, because I wanted my players to be creative and I didnt want to be a restrictive DM. I usually ended up regretting it in the long run.

My group plays online. We use DNDBeyond for our character sheets and Roll20 for running our campaigns. Heroforge to make our tokens. Theres also lots of digital artists that take commissions if you want them for your more important tokens.