Dear usman bhai
Welcome on thread and accept our heartly congrats for having new aspire mashallah , Allah app ko naseeb kare (ameen)
As 2 of brothers already guided you well so not much left to add, since u are in pindi so u can also get detailing stuff from dubai autos pindi , in morning I will provide u his cell# , say my salam to him inshallah u will get same rates as of shahid autos 
Usualy new car skin don't need claying however last year when I got delivery of my orca, her skin badly required claying process so about claying decide yourself after doing bagy test as claying is harmless process and provide very clean , smooth surface for best reflections, shine and with good bounding surface specially if u going to use paint sealant than claying will give best surface to sealant for best bounding.
Meguiar's smooth surface clay kit is reasonable option
Wish u all the best and looking forward to welcome ur aspire here 