Personally, F-Droid is always my first choice. If an app I want to install is not available in F-Droid I will get it from the Aurora store. I do not use the Google Play store for anything.
Depending on your thread model, F-Droid's security shortcomings may be relevant. That is something you will have to determine for yourself. https://privsec.dev/posts/android/f-droid-security-issues/
As was pointed out, this topic has been all but beaten to death here in this forum and elsewhere online. As you can see in this thread, even within the community there are a variety of differing viewpoints; the best you can do is research the topic for yourself and decide on your own how you would like to handle package management.