Hard to say: I'm a long time DnD player and played all editions at some point and I love BG3. Your party feels like a bunch players making their quirky characters and the game gives you a lot of freedom to approach things. It might be one of the best approaches to get the table top feeling in a computer game.
Of course, if you don't like 5e, you might not like the game.
And yes, you can't make portraits, but you can customise your character at the start.
I haven't played any Divinity game yet, I discovered Larian through BG3, so I don't know, how similar they are in terms of gameplay. I like the turn based combat in BG3 and most of the implementations.
Maybe look at a let's play ( I would recommend only first act though to not spoil too much) before buying the game?
