It's not clear exactly which Fire you have. If it is the standard Fire, the display is probably not as good as the iPad, and it may be much smaller. I have a Kindle Fire HD 8 which compares well with my iPad mini. My iPad started to malfunction, and Apple could not repair it. Rather than paying the big bucks for a replacement, I bought the Kindle Fire HD 8 for $69. Use of the Kindle is very similar IMO to an iPad. One thing that is much better is file transfer. If you want to import something to an iPad, you have to do it through iTunes. With the Kindle, you just connect it to your PC and drag and drop files (pictures, videos, digital comics, etc) to it like it's a flash drive.
Once I figured out that the Kindle was a worthy replacement for my dead iPad, I also put in a 32 gig SD card.
I’ve had a kindle 8.9HDX for almost 3 years. I wish they still made them. It’s incredible. Graphics are great and it lasts for at least 12 hours.