Need your advice

Hi r/startups!

Really need your advice.

I am a 2nd yr student.

I was going to start a b2c company (prototype ready) with another guy.

The issue is I will be unable to give 100% in the service if I do engineering. Both the things at the same time is not possible.

So I have to decide btw the two choices:

1: Startup (which I want)

2: Engineering (for people- personally am not liking it at all)

And am really confused which one should get the best bet.

Can you suggest please? What do you do if you were in the same place?