I also have a harder time with older games, but RDR1 is definitely an exception. It's worth playing for sure, and RDR2 is probably the best game I've ever played. It's worth the time.
Although I'm still mad, the remade the whole damn RDR1 map inside RDR2 for future online stuff and they didn't bother to just remaster RDR1 as a DLC? So fucking stupid. Would have been just a pure profit generator