I made a post a few days ago asking your opinion on Manjaro and it was very mixed, with a slightly negative overall opinion. I heard some recommend EndeavourOS instead and did some online research and it seems to be pretty solid and not have the repository problem that Manjaro has.
Just for context I am a Linux noob and have only used Mint for about the past six months. While I don't have any major complaints, I am looking to explore more distros and the Arch repository with its rolling releases. I am not a huge fan of how certain packages on apt are a few years old and outdated. However, I also don't have the time to be always configuring my OS and just want something that works well out of the box.
Is EndeavourOS a solid choice?
Tumbleweed is a snapshot of factory. Leap is based on SLES which is based on Tumbleweed. The next SLES release is likely to be immutable and there will be something like Leap but it could have a different name.
This is good information! I tried to give OpenSuse an honest try, and while I would recommend it over RHEL any day in enterprise environments, I just don't like it as a daily driver workstation.