[mdifrgechd]

Others have mentioned it depends on what problem you are trying to solve, but it also depends on your past experience and what you are already bringing to the table. E.g. If you are a recent high school grad, more CS fundamentals might be valuable. If you have experience from another industry, maybe you want to focus more on what the technologies you are considering will unlock in that industry, and look to a co-founder for some of the nitty gritty tech details. Where are you starting from?

[wespiser_2018]

I came here to say this: the domain is important here. Are trying to do web retail? then maybe you should just learn php and do Drupal. Are you trying to do a business that depends on some sort of data or analytics? Then python is probably the way to go. It all depends, and I would be very apprehensive to say "use X" without knowing the problem set.