Book 4 of Ptolemy’s Tetrabiblos offers delineative techniques on marriage (whether you shall marry, the quality of the wife, at what age, etc). You can find a free PDF online, so you may apply the methods yourself and be able to interpret your own natal chart this way.
That’s just one book. Try Vettius Valens’ Anthologies next. There’s also a free PDF online released by Sacramento State University and has a lot of techniques for marriage.