Since you are a new driver, we would recommend the Tata Punch. The car's compact dimensions will make it easy to maneuver in the city, and the elevated seating will also provide a good view of the road and the outside conditions.Do note that if you are buying a manual, the clutch is on the heavier side. However, since your driving is occasional and if the traffic is not heavy around your area, this should be manageable. The Punch has also recently received a major facelift, so you will enjoy the novelty of owning a brand-new car.

Both are very different cars. The Tata Altroz diesel makes sense if you are driving long distances and spend long hours on the highway. The Altroz’s relaxed cruising ability, stable high-speed manners, and diesel efficiency and running costs are a better choice.The Skoda Kylaq has superior engineering, brilliant ride and handing and a very smooth 1.0 TSI engine. The Kylaq is much nicer to drive, more spacious, and overall the better car of the two.

The Nissan Magnite would be a good option. It is well-loaded and has a 360-degree camera, which doesn’t have the best resolution but works effectively. Within your budget, you will get the 1.0-litre turbo engine with the CVT gearbox, which is much smoother compared to the automated manuals (AMT) that you typically see at this price point.

No fitting things like airbags and ADAS are a very complex affair. It isn't like fitting a music system or a new horn. To work properly or even at all, these systems need deep integration with the electronics and the mechanical systems, which is nearly impossible to retrofit. If you would like these new features, your only real option would be to sell your Amaze and buy one that has these features.