Hello and welcome. There are many things you can do on this site and I hope to some of your art soon.
To share any work after it's finished, hit the 'Share' button and type
the account name of the person. You can always go back to a tutorial
whenever you want, so don't worry. Also, if you need to save your work
so you can finish it later, hit the save button above the load button
(these are labled btw) to save it. Hit the load button to load it. To
upload a video onto your page or to share a video by coment (like this
one fore example)

Hit 'embed' below the video
screen while on the original site it came from (for example, Youtube)
and copy the link. Some links won't work, but don't be upset, there's a
lot of codes to upload image, so keep trying until you find the right
one. If you have any questions, just ask, okay? I'd be happy to help