Bible verses relating to learning Christian Doctrines
2 Timothy 2:15 Be diligent to present yourself approved to God as a workman who does not need to be ashamed, accurately handling the word of truth.
2 Timothy 2:14-16 (in Context)
Protestant Catechisms
Wikipedia definition: A catechism (from κατηχέω, to teach orally), is a summary or exposition of doctrine and served as a learning introduction to the Sacraments traditionally used in catechesis, or Christian religious teaching of children and adult converts. wikipedia.org/wiki/Catechism#Protestant_catechisms (links to several more)
Westminster Shorter Catechism in Modern English with Scripture ... matt2819.com/wsc
Catechisms, Christian Church Doctrine, Christianity, Faith biblestudytools.com Read catechisms online. Christian church doctrine and memorization for Christianity and faith. Free Bible Study Tools.
Baptist Catechisms - The Reformed Reader reformedreader.org Has references to many historic chatechisms going back hundreds of years
An easy to use version of the Westminster Shorter Catechism in Modern English with Scripture Proofs and Comments. The One and Triune God - God's Eternal Plan - Creation - Providence