i would suggest typing the text, then convert it to a shape layer by right click on the layer in the layers panel so you can scale it to any size as a vector layer
The maximum point size for text in Photoshop is 1296 points.
The '+' sign at the bottom right corner means that your text box is not large enough to contain all the text.
Start by making the text box small enough so that all of the text is visible (no + sign).
Switch to the Move tool.
Edit > Transform > Scale.
Hold down Shift to prevent distorting the text, and drag a corner handle until the text is the size you want. Release the mouse before releasing Shift.
When the text is highlighted with the Type tool, the point size will display in the Options bar.
Thank you very much. Greatly appreciate your help.