Lately i've been trying to write tabs for a song and i'm very satisfied with the first half of the song, but my problem is, i don't know anything about music theory, and that makes it difficult to choose the chords for the rest of the song. Those familliar chords that i know can't be applied anymore. So, must i study music theory? ( which might take months or years), or is there any other ways to learn how to choose suitable chords for a song? Thanks in advance.
P/S: I'm a newbie here, hope to make friends with everyone :)