Do I have the guts to be a Christian?

Depends on whether that means a “believer” or a “truster/doer”.

I’m very good at the first one and very bad at the second.

Does it take guts to move from the first to the second? How do learn how to have guts?

Seems to me that it is the same question as “How do I move my faith from my head to my heart?”
If it takes guts doesn’t that imply I’m relying on myself? NEVER a good idea for me in matters of faith!