A lot is going to vary depending on the exact game you play, strategies and game mechanics can be super different. The best way is to find a character that you really like and focus on having a good time. It’s a genre built off of learning from failure, so you’ve got to try your moves in different situations and see what works. You can practice moves against bots to find what situations they work well in, and plenty of people post combos you can learn online. Just gotta lose a lot.
Danganronpa, honestly any of them. Once you know the story, who the killers are, and the twists, it quickly loses it’s charm. The only way afterwards is to watch other people play it for the first time.