Somebody is going to finish the body for you, but doesn't know how to install strap buttons or ferrules? What, they don't have screwdrivers and drills in India?
Lord, the strap buttons take five minutes or less, drill two holes and screw them in. The ferrules, you push them in with a screwdriver. If they are too tight, heat them up first then push them in, or sand the holes a little bit. Again, five minutes. Honestly, why are you making a guitar if you haven't bothered to learn this after hundreds of posts? Sorry to be rude.