I came across a valuable course that’s extremely useful for preparation, as guesstimates are often asked in MBA recruitment interviews. Explore it here: https://learn.gocrackit.com/learn

Several computer courses can be beneficial for a B.Com (//B.Com) student such as

1. E-Commerce

2. Digital Marketing

3. Web Designing

4. Tally

5, SEO

6. Data Science

The best course for a student depends on their career goals and interests, students are advised to do some research before applying for the admission.

B.com after courses in computer carrier in life

Hello,
It totally depends upon you,in which field you are willing to pursue your career. 
I will provide you with few of the course which you do.

Course: 

Marketing :

Web Designing / Graphics Designing / UI/UX Front End Developer.

Search Engine Optimize SEO / Search Engine Marketing / Digital Web Marketing.

Designing softwares like AutoCAD, Photoshop.

Finance:

Microsoft suite.

Macro and C++ , Java programming language (this helps with excel).

Bloomberg and Reuters.

Tally/SAP.

Informatics/SQL.

Operations:

Software Test Engineer / QA Engineer / Quality Assurance.

JETKING (Hardware)/ NIIT/ ICA(Accounts related).

I hope this information helps you.
Thank You.