Welcome to the Fediverse! Somebody has probably told you this, but I just realized that I forgot to hit "Post" before I went to dinner. Here it is anyways.

When I wanted to sign-up it required an application that you needed to fill out with one of the requirements being having to copy a sentence from the link provided which links to some article called “The Principles of Communism” which I thought was very odd for a site to do. I’ve never seen a site like this promoting some ideology that directly where it’s part of the sign-up process to almost pledge to some political or religious ideology.

The applications and copying of a particular line is a simple form of spam prevention. The fact that the line is from “The Principles of Communism" is probably because the owners of that particular instance (who are also the main developers) are communist. I believe they also run Lemmygrad, which is full on Marxist, and one of the more commonly blocked instances. Lemmy.ml is intended to be a more mainstream instance but like much of the Fedi leans hard left.

I mainly moved here because of the censorship on Reddit where they didn’t publish posts that included the slightest word not allowed by their filter and they removed/blocked lots of content. I wonder if it will be somewhat better here

Lemmy is censorship resistant, but not censorship free. There is a difference. Censorship (or moderation, depending on your view point) happens at 3 levels, user, community, and instance. You can't do much if other users find you obnoxious and decide to block you, but if you find the moderation of a community to be over bearing and if your current instance allows, you can create your own community from your current instance and mod it how you see fit within the guidelines of your instance. If you find your instance's moderation to be overbearing, you can create your own instance and moderate it however you see fit. However, you will still be subject to the moderation policies of the communities (and their home instances) that you subscribe to.

In the Fedi you have absolute freedom of speech, but nobody is required to give you a soapbox or megaphone and nobody is required to listen to you.