I would say don't worry about the flying during the ATPL's. Did not get anytime to fly during the 6 - 7 months of the ATPL course, studies + family had to take priority. Had 1.5 hour session/checkout with an instructor - and did about 7 - 8 hours before I started the the CPL course.
First time I did not fly for 16 years, had 14 hours + skills test, nearly like riding a bike. If you feel unsure, take a few hours with an instructor. Missed flying, however the ground studies took so many resources, and felt that any flying during this period would be of no practical gain, just flying holes in the sky - which was a waste of money and time. Put some effort to fly a bit a few weeks before I started the CPL course, just to sharpen up the mind and checks again.