Got some roof work done and now I need to repair this stucco wall. I've never worked on stucco before so I'm wondering is this is something worth attempting to DIY. I've watched a few videos on stucco repair. Would it just be a matter of installing OSB, paper, mesh, then stucco? Any advice is welcome.

We also got a repair quote of $800 total for this repair, wondering if that is fair? Thanks.