Okay, what worked best for me while studying, was to make overview of the study material, ideally to have an 'index' or 'table of contents' (or, I wrote one! ) and then to go over that, maybe putting 'check' marks next to the chapters/topics studied. These were always physical (paper). You may need to figure out if paper or electronic would work best for you.

This will give you idea of progress. Always add some days to review.. What was also helpful to me: to write notes, use colors (for underlining), make mind maps, make funny associations/add mnemonics... Deadlines (exams) were helpful too, as incentive.

Maybe you can give yourself rewards (or punishments? eg to buy your wife ice-cream if you DON'T study? )

Also, maybe your environment is too loud/unpredictable at home, and you might study better elsewhere? (at library/cafe?) At the Uni, I could study best in a study room with other students, or if my roommate or flatmates were studying too! Or join a course? (That way you HAVE to study! And there's friendly competition etc!)

Maybe some things like these could help? There are LOTS of books on effective studying, some are even specific, about languages or maths etc.