If you are coming from python to ruby, you might miss just setting up a simple
virtual environment for you packages, without having to worry about versions
colliding for different packages in different projects.

This is my attempt of doing something similar in ruby.

There is this thing called rbenv, which is supposed to let you select different
versions of ruby for different projects. You can `brew` install it, or trust
and just execute a curl | sh command.

https://rbenv.org

Keep in mind that before installing any version or whatever you will have to
make sure you have installed  the pre-requisite packages for ruby to work.

https://github.com/rbenv/ruby-build/wiki

Once you have that install, you can list the available versions of ruby with

```
rbenv install -l
```

Then choose one and install it.

rbenv install 3.4.8

I pray to god that you are not using RHEL 8 but if you are, you might need to
install a yaml package, the thing is that the yaml package is not in the
repositories that are used by default, so you need to add it.

```
sudo subscription-manager repos --enable codeready-builder-for-rhel-8-x86_64-rpms
```

Now, with some luck, you will be able to go to the dir where you want your
project to live and just run:
```
rbenv local 3.4.8
```

Then 
```
bundle init
```

Add your gems to the Gemfile and be good to go!

```
bundle build
```

Good luck!