As for selecting lyrics: try to make a block selection (or select just everything) and do Edit > Filter > Lyrics. I guess the filters are not excluded from Dorico Elements, I’m not sure though because I don’t have it.
All those text formatting options you miss (including adding more elements of the project info dialog to text frames) are located in Engrave Mode in Dorico Pro so you’ll probably have to make do without them.
Unless upgrading to Dorico Pro is an option for you I suggest that you export your scores as pdf and add the additional text elements with another program. Perhaps Inkscape? It’s a free editor for vector graphics. I often use it to make small adjustments to my scores that surpass the abilities of the engraving software. I imagine this would be less frustrating than adding a copyright note with a text object that you can’t even properly move.