This post is not only to try finding the best Mastodon instance/server but I also wanted to express about the Mastodon instances.
Most of Mastodon servers are apparently harsh about other instances that include things they don't like and are quite serious about getting those Internet points putting how the place isn't welcome for "bigotry" and is for everyone and so diverse, and I wouldn't have any problems with this if this wasn't frequently used by people who will try to shut you if they disagree enough with you and will try to present themselves as so virtuous.
You'd expect that the free side of the Internet would have people that value freedom and should let anything that isn't a crime or something that prejudice the instance itself or whatever space they're in but it seems this vision is getting far from the reality with time.
You will be hard-pressed to find a home on the #fediverse as somebody who is conservative. That's just a simple fact. The fediverse is generally a home for those that reject capitalism and have gone hard to the left. The reason for this is because corporate social media banned and censored people that share my viewpoints. This is most likely why you aren't getting the reception that you hoped for
That much said the protocol that makes the fediverse work, ActivityPub, is completely standard and free to use and adopt. There is nothing other than time preventing you from studying it and deriving an implementation that will put you in touch with people that share your values.