The technical side of exposure is not necessary, unless you want more control over how your photos look. If you're intent is simply to capture life's moments, a fully automatic exposure setting will work 90+% of the time; cameras can do a lot without our fiddling with them.
That said, as mentioned, knowing the camera's / phone's controls and limitations, as well as the artistic side (visual composition) are what you want to concentrate on, first. The exposure stuff will be handy if you want to go beyond the "defaults" the camera or phone will do.
One more thing - be sure to post a few here and get some critique. Good luck, and looking forward to some of your work.