Are Glass Cannon Unit good for solo plays on MMORPG?

[waxensens]

Hello this my first post on here and I want to ask since this will be my one of the first MMORPG I will play. So I saw the game called "Ni No Kuni Cross Worlds" and I was wondering what class I should use for solo plays since I don't really like to socialize much and there's this witch class where high damage but low defense and I was wondering if its good for solo plays in this types of games since most the game I have played has been peaceful or fps like "Minecraft, Terraria, CSGO, Valorant, etc." so I dont really have much knowledge here (also please forgive me if my English is bad).