Asakusa to Tokyo Station by .....

It's my first time to go to Japan ...Everywhere I can manage where I wanna visite and how to get there... Except at Tokyo, on 5 April, after I visite Asakusa Shrine how can get back to Tokyo Station. There are 2 lines of subways next to Asakusa, which line is easy and not complicated (If I miss understand, please give me your kind advice)
At Tokyo Station, I have a appointment with my friend in front of ''Information Center (for foreigners), How I can find it out.
Thanks in advance for your help :)))

Easiest way is to go by Ginza Subway Line from Asakusa to Kanda Station. At Kanda Station change to the JR Chuo Line for the quick trip to Tokyo Station. Tokyo is the next station from Kanda.

Many thanks for your answer, then I know how to getting there.