> if (!requireNamespace("BiocManager", quiet = TRUE))
+     install.packages("BiocManager")
> 
> BiocManager::install("org.Hs.eg.db")
'getOption("repos")' replaces Bioconductor standard repositories, see '?repositories' for details

replacement repositories:
    CRAN: https://cran.rstudio.com/

Bioconductor version 3.14 (BiocManager 1.30.16), R 4.1.2 (2021-11-01)
Warning message:
package(s) not installed when version(s) same as current; use `force = TRUE` to re-install:
  'org.Hs.eg.db'

This means you already have installed org.Hs.eg.db before. You only need to install the package once and then whenever the package or R is updated. After you have installed('org.Hs.eg.db) once, subsequent sessions you should just be able to do library('org.Hs.eg.db') to load the package.

Cheers,