I am new to this and I want to add ,my own fonts to my font library, how or can you do this?
No you can not add fonts to Easel. You will need to do your design in a different software and save it as an SVG then import it into Easel.
Another quick-fix is to use a different text editor (Word, Photoshop etc) and create a black and white image of the text.
Then use the Import Image app in Easel.
Inkscape can generate straight-up SVG´s for Easel imports aswell.