If you go by the positive sides, you can see that you have undertaken a course regarded as a prestigious course in the job - sector. Side by side, you want to continue you graduation course. Combination of these courses, though apparently, seem to be strenuous and time consuming, the end - result would be pleasant.
With respect to the gap, you should not worry much and if the results of these courses are impressive in both the cases, no one is going to ask you such questions.
You need to have a proper planning so that there is a curtailment of time by choosing such subjects in graduation - level for which you are likely to appear in the CA test. Accountancy and Business - management taught in B.Com stage would help you to understand the basics of CA and even a lot of time would be saved in conceptualisation of the subjects. Graduation with other subjects can put you in stressful situation if proper guidance is not available to you.
The practical approach, under the present circumstances would be join a reputed institute who can offer you excellent guidance in the preparation of CA. You may take the help of Internet to surf such institute. For the course of graduation - level, subjects should be chosen for which you do have passion. Remain in touch with the professors, who can help you in this direction.
You need patience to tackle the present circumstances.