Hello Wendell, I see you've joined recently, so welcome.
Sorry to read about your medical issue, hope I can help you with both problems you face flying.
. . . and mate, and there is definitely hope for you, if I can resist tech a lot of my life and fly my drones, anyone can !! ha ha.
Regarding the map and directional arrow.
It's always worked great for me, but I ensure good sat signals, home point recorded and direction of flight confirmed on the map, and to be safe I come straight up to 10m on take off and let precision landing get its fix.
With the viewing device, as said above, a larger device is amazing.
I have poor close up eyesight and find the ipad
mini 4 is so (SO) much better than using the iphone 6.
It will fit into the arms of the controller ok, but it is on the outer limits . . . it should ease in and become a little more easy to fit after a few uses.
(The sports mode button on my MP controller is a pain to get to on the side, but I think the Air controller has this on the main front ?)
But if worried about that, you may have to go for a specialised aftermarket mount, of which there are many great threads here on the forum.
You just need a longer cable, either with fitting into the controller arms, or if using a mount.
This is my set up with Lifthor mount and spiral cable . . .
With VLOS (visual line of sight), you could try the strobe LEDs available on the market.
Try reading these threads, there are Creeon brand and Firehouse Tech with the ARC2 4 led lights, supposedly the best vision, but a few QC issues of late, so read up on these threads a bit, they might be over that now.
Just ordered 2 ARC II lights with mounts
and another pilots follow up
Installed Strobe Lights on Mavic Pro
Other than that, a bright skin might make it easier to see ?
Plenty of threads on skins here in the forum too, just put that into search.
Best of luck with it Wendell, don't give up as you will find ways to make it work.