@fouadbakht excellent advice. For total noobs like me they can start taking care of their cars with these simple first and economical steps and they can gradually move towards claying, compounding and sealants (don't worry right now about these terms) :
FIRST STEP
The first thing is to forget about "DRY DUSTING" especially those who have drivers, the drivers keep massaging the car dry with peela kapra
Second thing is to throw all peela kapras in dust bin and buy at least six micro fiber towels (But still do not use them on car dry or wet)
The car exterior should always be cleaned with two bucket method (one with shampoo solution and one with plain water). This is no rocket science. When you apply shampoo on car, never put the wash mitt again into shampoo solution and first dip it in plain water bucket and get rid of the dirt it caught. After rinsing it in plain water bucket, then dip in shampoo and work on other panels.
Wash in parts, first upper panels like roof, trunk lid and hood. First hose these parts, then apply shampoo with wash mitt and again hose or rinse with balti and dubba (if water is short
)
Wipe, dry with a clean microfiber.
Congratulations. You have done it. You have saved your car from a lots of swirls. You can continue with this routine and after some time think about step 2.
SECOND STEP:
A total noob like me would start purchasing a Quick detailer. It is easy to spray and wipe it after washing the car and it leaves an instant detailed look and gives some protection to you car paint.
A spray wax can also be used as it takes no effort, just spray mist and wipe with microfiber towel.
For cleaning interior an interior detailer spray is handy (throw away that revive all and luster)
After sometime ad an All Purpose Cleaner into your arsenal.
Also get a gel for tires and trims
When you get easy with this routine, only then go to next level, that is claying, compounding, polishing and waxing.
Once you see the change, you will dread taking your car to service station again.
After sometime you may like to invest in a good wax and apply that wax after washes.
Rest you can learn from Google Ustad as Fouad bhai has elaborated in a very lively and candid post above.