Anything that is NOT a phrase whose meaning is not clear is NOT an idiom. This is a confusing question, because a tortoise is not an idiom. I'm not sure exactly what you're wanting here.
a blessing in disguise: a very good thing that was only recognised later
a dime a dozen: anything that is easy and common to get
Try this question for examples of idioms.
"Idioms for Being Afraid", "Idioms for Being Angry", "Idioms for Being Happy" are some examples of idioms found in the book "Found" by Margaret Peterson Haddix.
Check out this question for idiom examples.
The best place is to go on your search engine and type in "list idioms" You can also look at this question for some examples.
Some websites that have idioms written in them include The Free Dictionary, Cambridge Dictionary, and Phrases.com. These sites provide definitions and examples of idioms to help users understand their meanings and usage in context.
huwag mag malinis
I don’t know
Two examples of idioms in "The Medicine Bag" are "butter wouldn't melt in his mouth" and "jump out of one's skin." These are phrases that have a figurative meaning beyond their literal interpretation.
idioms
Metaphors Similes Onomatopoeia Idioms
There are extensive online lists at the related links below.
There is no one list of all idioms. Every language has its own idioms, as do most of the countries. Here's a link to some common examples.