Hi! I want to share pictures of a purebred puppy that I am considering for adoption but I have no clue as to how to attach or post a picture with this message. Kindly help how to do so so I can share and benefit from your valuable opunions! Thanks!

Take a look at the upper right hand corner, there, under "Stickies and Announcements" there's a thread called "How to upload pictures"  It's a bit out of date but it should give you some ideas on how to make it work.

... and welcome to the forum.

ETA (edited to add): if you edit the first message in this thread, you can change the typo "chooding" to "choosing" which is what I think you meant it to be