Cleanest and most proficient way to add text under my still images, looks like many options but for straight forward copy text what is the best practice?
InDesign would probably be best if there is a lot of text.
If you're just looking for a line or two, you could do it in Photoshop.
It depends... will these be for online use or for print?
Please provide more details on how you will use the images.
On Adobe Portfolio/Behance web sites, I use Captions -- real HTML text which can be indexed, searched and translated. Text added to actual image files is rarely a good choice on the web except for watermarks or branding.
Not sure what you're doing or which Adobe software / service you're using so it's impossible to offer more than guesses.