I am 26 can i circise at this age...what are its after effects...like wld it be painfull..and how long will?

i am 26 can i circise at this age...what are its after effects...like wld it be painfULL.....AND HOW LONG WILL THE PAIN LAST......and..m not informing my parents abt it......so wld i be able to act normal as far as the pain is concerned....and i wlod like to get this done..........and wld it be expensive.....