Where does Moses say the things which Paul attributes to him in Acts 26:22-23?

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In Acts 26:22-23, Paul says that

I stand here…saying nothing but what the prophets and Moses said would come to pass: that the Christ must suffer and that, by being the first to rise from the dead, he would proclaim light both to our people and to the Gentiles.

It seems like there are three claims which Paul says Moses and the prophets made:

1. The Christ must suffer
2. The Christ would be the first to rise from the dead
3. The Christ would proclaim light both to the Jews and to the Gentiles

Furthermore, Paul claims that both Moses and the prophets made these claims. My question is: Where in the Old Testament are these claims made (explicitly)?

I have looked around and found answers such as this article from the Christianity StackExchange, but the answer of Moses’ writings about Jesus are very vague and unconvincing (e.g. reading Jesus into manna or the water which sprung from a rock). Such an analysis seems to be guilty of reading meaning back into the passages after-the-fact.

I would be interested in any answers addressing my original question or my doubts about the vagueness of the references found in the article I linked. Thanks.