Do not attempt to do it alone.
If you’ve got an idea which you think is worth making, maybe look around for an existing group to collaborate with? Maybe there’s an indie company near you who will fall in love with your idea.
Whereas lighting, sound, editing… all that are vital elements to any film production, you can’t and shouldn’t even consider learning them all. Don’t get me wrong, an understanding of them is vital for a director but each element is a different skillset. Your brain will implode if you set out to be a one human film machine.
I’m primarily a writer and director, but I can shoot if needed. I much prefer to let one of my more knowledgeable collaborators shoot though.
Saying all that, I know that at the very start it can be difficult to assemble a team and the one that’s free is the script, if it’s yours. Write it well, let others read it, take feedback and work it until it shines. There’s a reason a lot of web series are produced as vlogging shows - they’re cheaper and easier than say a web series about a vampire hunter that features dozens of practical special effects. Only a fool would try something like that for their first project…
Check out -
The New Adventures of Peter and Wendy - https://www.youtube.com/watch?v=_XbD_IYYMVk
Brains - https://www.youtube.com/watch?v=2gfDPnAS3Bs
Jenny Jennings - https://www.youtube.com/watch?v=Ibh32XZ1Jug
Mina Murray - https://www.youtube.com/watch?v=38sREiRdA7Q