A good confession or catechism can be a useful tool for understanding how the Bible teaches regarding specific subjects. I hope it's ok to post a link to one. If not, mods please remove this. Realize that most are denominational specific, so there will be some things that others will disagree with. But most things should be universally believed among Christians. The main things are the plain things in most cases.
https://founders.org/library-book/1689-confession/
