Agreed. CPT must be prepared with B.Com.Ist year.
When you clear your CPT; prepare for IPCC and try to clear both the groups at one sitting.
By the time results would be declared; you might be at half way of B.Com.IInd year.
This way you would be able to enjoy your college life also which is a must for development of personality - confidence; attitude and manners. You would be able to interact with many friends on different issues.
At that time; you would be matured to some extent for CA profession also. Because when you will complete IPCC; your theory part would be clear relating to various subjects. Since there is no tension of passing IPCC; hence you would be able to take/enjoy training well.
The good thing is that you wish to enjoy your studies. This is one of the positive factor which will give easy success to you in CA.
It is my humble suggestion to you; when you go to the college; listen very carefully the lectures and try to correlate it with your text books.
Surprisingly; you will find that very few lines were there in the lectures which are written in the text books.
The lecture given in the colleges are generally of conceptual nature. Hence you will find the whole study pattern altogether different than your higher secondary level.
Wish you all the best.