Most third graders can run circles round electronics, you want one an old man can use.

Just take a third grader along hunting.

Get one that's simple but lets a simpleton expand if they can get past the power button. Garmin hcx models do that and mine will run for days on lithium batteries, enough time for even old men to figure out. They also stop using batteries when hooked up to the computer. Lets you watch youtube vid after youtube vid showing you all the features.

Come on man, Internet's been around a long time, you ain't figured out how to use it to learn yet? You do need a third grader around.