I'll start with the order they go in, and anyone please correct me if I mess up anywhere ^_^
It goes; +color, ID, ID L, P's, then the 4U
Then of course you have your special edition versions for each version, there is an English version of the ID L, however it is usually around 100$ so it's your choice if you wanna buy it. In my opinion I like the 4u better just because of the graphics, but the downside of the 4u is that it only has 10 adult characters and does not use infrared connection.
If you want a color tamagotchi in English I suggest getting a Tamagotchi P's because you can easily patch it with English translations. Which to do that you would need a phone or USB with infrared connection in order to transfer the files which there are many videos on how to do it!
the P's is a good one to start out with because you could also download games and many other things onto it like the ID L. Also a fun part about the P's is that it has these deco pierces that you can put on them for special effects to add games, characters, wallpapers and etc... Also you can easily get a bundle of a tamagotchi P's and a deco pierce for around 40$ on Amazon and it's totally worth it.
I'm sorry if I'm a bit all over the place in my answer, I tried to answer as best as I could haha. Lemme know if I can be any more of help!