Hi Doctor My Name Is Priya And I Am 25,

Hi doctor
My name is Priya and I am 25, by next year I am getting married so i am in search of a good cream with vitamin C that could improve my complexion a bit and give a glow. I have been eyeing on several market serum of vit C and they are all quite expensive and are not available in India. Was thinking of using DR Reddy's clear skin cream as suggested by one of my friend. My questions are
1. Is it safe to use Clearz without a prescription?
2. There are so many variants of Clearz say Clearz, Clearz plus, Clearz Ultra etc..which of them are safest and yields faster result?
3. should i use sunscreen at home?
NB- since i live in a hostel it is harder for me to follow any skin routine but i do use sunscreen and do not have much skin issue..just due to lack of maintenance lost some shades and glow.

Thankyou.