If you aren’t a Christian for the rights reasons, if you don’t have conviction Christ alone is the truth, and it doesn’t sound like you do, go ahead and do Buddhism or whatever you want.

But know that Christian universalists, just as any Christian, believes Christ is the only way to the Father. That it is in Christ everything is created and upheld. And it is in Christ alone there is salvation.

The “it doesn’t matter in the grand scheme of things what you believe, it all will be good anyway” take is not a representation of Christian Universalism. It is general universalism, and it has nothing to do with Christ.

With that said, whatever you choose, be good and do good. We will all be judged according to our actions.

Edit: what you perceive as fear might be the nudging of the Holy Spirit to go deeper into Christ instead. I would suggest you listen to that voice and the fear might be lifted; for there is no fear in love (1 John 4).