I've been told you can use this phrase in restaurants to signal that you've had enough. But can it also refer to a collection of things? Example: I'm moving and my friends ask what I need to move and I point to some boxes and say Это всё. Like, 'that's it' or 'this is everything'. Would I be correct?
это can mean this is, that is, it is, depending on context.
Это is also the neuter form of этот as a demonstrative. Это кошка, this is a cat. Эта кошка this cat. It can be confusing because это is spelled the same both ways, so you need to have context.
In this context, translating "it is all" sounds a bit weird to me. In this context, it makes more sense to translate it as this is all/that's all.
I think they explained in a couple different comment sections, but I believe they said there are two 'eto' that look and sound the same but function differently. the first is always 'eto' and is a more vague 'this' in general, like in this case, this is all. More like a gesture?
The other one is actually 'this one right here in front of me' referring to something very specific. When it's that 'eto' it is conjugated depending on the noun - etot for masc., eta for fem., and so on.
Sorry if that wasn't very clear - I'm learning as well!
I really do highly recommend learning the alphabet and not relying on the transliteration at all - it's a relatively small outlay of effort with large benefits.
I've yet to come across any transliteration of Russian that's foolproof, and the one Duolingo uses is really iffy. IMO, you're much better off learning how всё неё etc look in Cyrillic than trying to learn via a really dodgy transliteration and come out the other end with a much weaker grasp on Cyrillic, which is pretty much vital if you want to be able to learn Russian from another source/to use it for any reason other than speaking/listening.
(And even if your plan is to only use it for that/not to learn Russian from another source, I think you're unnecessarily stunting your knowledge of the language.)
I know the alphabet. I'm currently waiting on a new keyboard and Russian alphabet letter stickers to also come to put ON the keyboard so I can type in Cyrillic. At the moment I'm sticking with the Romanized spelling since if I switch TO Cyrillic, then it will want me to type in it and I don't know where most of the letters are.
Then I'd recommend either printing out the keyboard layout or putting it up onscreen - I believe you can also input via some tool in Google and have Latin letter combinations come up as Cyrillic letters. Or you could download or create a phonetic keyboard (where, for example, С is mapped to S and Н to N etc - it's not ideal if you want to learn the "real" Russian keyboard layout, but if you don't have the Cyrillic layout to hand it's very helpful.
As I say, the transliteration is quite poor - I'm not convinced how much real value you're getting when you're using that, especially if you don't outright need it (since you know Cyrllic). Learning a poor and misleading transliteration is brainpower that could better be spent elsewhere, essentially.