I accidentally discovered playing by ear. So I play acoustic/electric guitar and electric bass. It helps if you like to sing and actually have a decent singing

I accidentally discovered playing by ear. So I play acoustic/electric guitar and electric bass. It helps if you like to sing and actually have a decent singing voice. I am a Christian. One of our daily activities is to just pray and sing Christian music (we call this activity worship) every morning after wake up and every night before bed. One of my friend at church taught me Nashville number system. However he told only one key, G to me since that was the easiest. I began to just look for worship music that I can play and sing comfortably in G. I found around 3-5 songs and did that daily. After a month, I realized that I did not need to look at the chord book anymore because I memorized it. Then my friend taught me other keys such as C. Then I tried to transcribe the songs that I already know to C and played it and tried to sing it as best as I can. Since those songs weren’t comfortable to be sung in C I tried to find 3 other songs, then proceed for another month to just play these. Then my friend taught me D, and then he mentioned that if I know how to play D then playing E is just moving it up. Then he told me that I already knew A because it is just G moved up. So I began to play around with various type of songs, slow and fast, and suddenly everything click, because it seems that majority of Christian music are 90% the same. I developed an ear for knowing which chord to play at what key. It is really not that hard. It is like driving. Hard at first but once you got it you got it. I applied this technique to bass as well. It is mostly just patterns. I have successfully taught one student this technique. She actually did it faster than me. I acquired CAGED keys by ear in about 6 months, around 1 key per month. she managed to play just in key of E in 2 weeks. Granted, she practiced longer than me daily.