Wondering if anyone has any advice on exploring other Christian denominations, if anyone else has done it, etc? Would it be sinful to attend a worship service at another church on Sunday (of course I would also go to Mass, and I would not receive Communion at the Protestant church). Part of this has to do with just pure interest in how the liturgies and preaching are different, but also to be honest, I am discovering the last couple of months that I have some strong personal theological inclinations towards another denomination. To be more specific, I have become quite attracted to confessional Lutheranism (think Lutheran Church - Missouri Synod).
I am a lifelong Catholic (although I didn't practice in my late high school/early college years). I'm now 24 years old and been a steady practicing Catholic for a few years now after returning to the Church ... and I accept all Church teachings as an act of faith, but intellectually struggle with many of them (primarily ideas of grace, Mary, and Church authority). What I want to happen is to go a worship service at the local LCMS church, find out it is not what I think it is, and then just go on being a Catholic and practicing my faith in the one true holy and apostolic Catholic Church. But I just feel like this will continue to nag at me if I don't at least "check it out." Thanks in advance for any advice.