As a first bike, the Royal Enfield Hunter 350 that you have booked will fit the bill well enough for your needs. This Royal Enfield bike is an approachable, easygoing, comfortable and decently reliable and fuel-efficient machine.
Other options which you have shortlisted, like the TVS Ronin and Yamaha XSR155, are also great bikes, but the Ronin’s design isn’t universally appreciated, and the Yamaha’s suspension can feel a little stiff over bad patches of road.
If you want more performance, take a look at the Triumph Speed 400, as that bike has a 400cc engine making 40hp and will be a good first bike too. Take a test ride of everything you shortlist before you make a decision.