hi,

see I assume you are asking to the preparation of develop IT skills while studying b.com (//b.com) . well MNCS like tcs, pwc, IbM hires the commerce background students for different management related post. so while studying b.com (//b.com) you may take courses on below mentioned area to gain your soft skills:

Tally erp

Microsoft Office and Typing course

statistical tools like R, SPSS

project management professional certificates

however you must have good communication skills along with decent academic record.

now coming to the coaching institute generally courses comes with packages and it is difficult to find single courses admission in coaching institute. some of the best institute is as follows:

INVENTATEQ @ BTM LAYOUT

Earvintech

I suggest you to go through some free online resources available on you tube then decide the course you want to take admission.