Okay so I found this insane seed on a list of Minecraft 1.16.3 seeds and it's actually crazy. You start right smack dab in the middle of a village that's on an island. Right nearby is another island with a well on it for some reason too. The whole island is surrounded by warm ocean, so you have tons of coral and exotic fish to play with.
The seed is: 7266643217019054895
It gets even better though. right nearby is a mushroom island biome, right in view from the village. Also there's a mesa continent in view of the village which gives you access to tons of colored blocks for your village island buildings.
But then there's even more. There's a cave right in the middle of the village that's got a mine-like entrance area that then leads to some small sprawling caves that give you all the iron and coal you need to start your adventure.
Here's the admist map too if you were wanting to see the whole area. This is such a cool Minecraft seed. I had to share it somewhere. Also I haven't been here in like 2 years or something and apparently we use twitch accounts now so I guess my old account is deleted and I'm really sad about it. Goodbye forever old account.
And just to say it again. The seed for this one is 7266643217019054895