There's just sooo much to do in such a short space of time.
The
time, is what
you define, you're not being rushed - don't rush yourself. 45 hours is a small fraction of the time it takes to learn to fly a plane through its reasonable envelope of capability and conditions. 45 hours seems to be the minimum the authorities place, but believe me, that at 46 hours and a wet ink PPL, you're still at the beginning of learning - you're simply safe, and compliant with the standards for skill.
The first part of the learning curve is steep, then you reach your plateau. That's when familiarity make's it look like you're not learning so fast. You're still learning - after 36 years of flying, I am....