> Every time I try to install one module, I get "missing prerequisite module" errors.

What platform are you running Perl on?

Further to swl's and stevieb's excellent replies recommending cpanm, you can see a detailed example of building perl securely from scratch on Linux using the App::cpanminus cpanm command here; the excerpt below should give you a feel for how this works in practice (note the ==> Found dependencies line below):

$ cpanm --from https://www.cpan.org/ Module::Signature
--> Working on Module::Signature
Fetching https://www.cpan.org/authors/id/A/AU/AUDREYT/Module-Signature
+-0.88.tar.gz ... OK
Configuring Module-Signature-0.87 ... OK
==> Found dependencies: IPC::Run
--> Working on IPC::Run
Fetching https://www.cpan.org/authors/id/T/TO/TODDR/IPC-Run-20220807.0
+.tar.gz ... OK
Configuring IPC-Run-20220807.0 ... OK
Building and testing IPC-Run-20220807.0 ... OK
Successfully installed IPC-Run-20220807.0
Building and testing Module-Signature-0.87 ... OK
Successfully installed Module-Signature-0.87
2 distributions installed
[download]

👁️🍾👍🦟