You may need a magnifying glass to read the model number on the back. If you iPad is in a case it might be time consuming to take it out of the case so make sure you write it down when you find it. I wrote the model number or my phone on the case inside the battery compartment with a sharpy (indelible ink felt pen). Now all I have to do is take off the back battery door) which takes no tools. I used to have to remove the battery too.
Sometimes you can find the model number burred on the "Setup" or "Control Panel" screens so you won't need a magnifying glass or need to take the case off. Search the internet for "model number" and "ipad" there are many pages that describe the exact steps.
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ADHD-I(diagnosed) ASD-HF(diagnosed)
RDOS scores - Aspie score 131/200 - neurotypical score 69/200 - very likely Aspie