My Father and I have just starting playing Sentinels the card game. I am ok playing this game, but my father has no experience playing games like this. Were are playing a very simple game with Baron Blade as the villan. No enviroment, and just two heroes. Just trying to learn the basic rules. And what we were wondering was, What two heroes would be the best to play with?
Yeah, it's a 1-5 player game, but a 3-5 hero game. If there are two players, suggestion is for each to play 2 heroes (which is what we do at home) or have one person play 2 heroes (which might be better for you so your dad can just focus on one?). Playing just 2 heroes will be nearly impossible, and will result is issues with the (H) mechanic that's used to balance the game.
No environment will likely be a little easier, but it's not something I've ever tried and will remove a lot of the fun of the game. You might want to try a more friendly environment to help things, but I don't know what you have available to you... :-(
My starter game is usually Baron Blade in Insula Primalis, with heroes as Legacy (usually played by me) and a choice of usually Ra, Tempest, Wraith, or Tachyon for whomever else I'm teaching. If I'm only teaching one person I use Dark Visionary as a second hero so I can control things and hopefully make the game a bit easier on the new player :D. Legacy and Ra go well together in terms of damage, and add in Insula Primalis and it can get plain silly :D.
Ra and Legacy on a team against Baron Blade on Insula Primalis is a good idea. If you don't mind trying to play two characters, I would say either Tempest or Bunker for simplicity.
My group's first game was against Blade on IP, too. It went downhill after that, as one person tried Absolute Zero, and another had Ra. Ra's Imbue Fire is not a good idea when AZ can't get his gear out. We did better against Omnitron, but Omni can be a pain to manage with his constant flipping.