Help with 2009 iMac Yosemite

Hi I’m looking for some advice on upgrading my iMac. I have two users and a lot of files that I don’t want to lose. I also have no way of backing anything up. I’m looking into OpenCore but am worried about it as my knowledge of computers is quite limited. I was thinking about trying to upgrade with OpenCore to Monterey? Does doing this delete everything you already own? My problem is that I can’t run any browsers or even access YouTube. Any advice or warnings would be really helpful thank you.

submitted by /u/ninatchi
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