I think this is what you're looking for.

now

I'm using a MacBook Air (13-inch, 2017, 1,8 GHz Intel Core i5, 8 GB 1600 MHz DDR3) for the same kind of development. Haven't had any issues thus far.

Reaction Commerce may be what you are looking for.

I would say python

Look at the Job market in the region you want to work as well as the type of work environment you are looking for.

This looks quite popular

Go

Less code and lower learning curve.

Definitely