There should be plenty of features even on Android for you if you'd find they make the experience easier. Magnification, making the text size bigger everywhere, high contrast modes to tune out all the visual effects and crap that you might find annoying, there used to be a 'Simple Mode' on Samsung phones a few years back. It tunes out a lot of the distractions and simplifies the menus as well.I've never had a touch screen device, My laptop is a mouse driven and click windows 10 type, so I've a lot to learn when I get the phone, not least of which being that the touch keyboard looks so small I do wonder how I'm going to get on with it and my big clumsy "sausage" fingers.
Best advise for the keyboard is just go boldly towards tapping on the letter you need and don't worry too much about the precision of your finger in the box on screen around the letter. Despite how it looks (tiny and like you'd need precision) the actual touch input area around the key is often larger / skewed as the phone - depending on which letter you tap - anticipates which keys you're likely to tap next. You don't need to think about it, it's a bit like driving - you look where you want to be, but the second you start worrying what's in front of the car you go all wonky across the road. And if you're like me, half of what you type is incorrect anyway and the spell check is able to figure out and continuously replace the mess with the right word 9/10 times!