Marvel Unlimited (Score 1)

I would recommend trying out a subscription to Marvel Unlimited. It's an app that has decades of digital back-catalogs for Marvel comics and newer comics on a six month delay. They also have a number of guided reading options, like "Read everything with this character" or "What to read before you watch Black Panther" and that sort of stuff. They also have offline reading options, so you can download a whole ton of comics before you get on a plane or something.