It's an open world souls game. The combat is challenging but rewarding and fun, and the game itself pushes you to improve as a player and achieve things you didn't think you were capable of.
If the game feels too difficult, the game gives many tools (e.g. spirit summons, NPC summons, and certain op builds) to make it easier / more accessible. Though keep in mind that the enjoyment of a souls game comes from defeating enemies that once defeated you.
It doesn't require any grinding or insane time commitments. The most "grinding" thing I can think of is just practicing a boss to learn their moveset and improve, but that's not really grinding imo. Many people have long playthroughs because they enjoy exploring, but you aren't forced into that if you don't want.
All in all, great game with universal praise; it's not for everyone, but I found that people who found it looks somewhat interesting and give it a solid chance tend to enjoy it.