@Jeruba I’m glad this is helpful.
If you are only reading books on your Fire tablet and using your computer for all your other needs, I suggest you get only a Kindle to read books with. They are very light weight and easy to use. I have the Kindle Paperwhite version that I bought in 2015 that is still going strong.
If you want a device to do more than simply reading books, I recommend this Samsung Android tablet. The advantage of using an Android tablet over an Amazon Fire is the ecosystem. Android is part of the Google universe, and it gives you access to the full array of Android apps from the Google Play Store. I am able to do almost everything on my Samsung tablet that I can on my laptop.
The Amazon Fire tablet is on the Amazon ecosystem. It is possible to hook it into the Google system, but it requires many extra steps that are humbug. The Samsung tablet I linked is good quality and inexpensive.
I do not have a desk. Using a laptop with a lapdesk in my chair is inconvenient. I use my tablet for everything I want to do while I’m comfortable in my chair. I only get out my laptop when I’m doing something that requires a lot of typing. I use my tablet for the majority of my Fluthering while I’m at home. I answer questions and post new questions on my tablet.
If you have a desk and are happy with your setup, perhaps you don’t need a tablet at all. If you want to use something while sitting in a comfortable chair, you may want to consider a tablet.
Finally, I will say that I’ve used Kindles for about 15 years. I really like reading on them. The text is very easy to see, and the size of the text is adjustable. If the text is too small, I can enlarge it. I have a good friend who uses a Nook reader from Barnes and Noble, and she is very pleased with it.
When I travel, I take my phone, my Kindle, and my tablet. I do not take my laptop. It’s very easy to travel with these devices.
(If you decide to buy the Samsung tablet from Amazon, do not buy any extra insurance for it.)