Andrew... I find myself in very similar situations as you and also started playing 14.1 awhile back. Something that helps me, when I rattle a ball in a good run, instead of re-racking I simply take the ball off the table and continue. I will pause to think about what I did wrong but then go on and see what I can do with the position I left myself. I feel this gives me more practice on finishing the rack and setting up for the next... otherwise, I would not often get there...