New challenge

You don't start tomorrow, you start now!

Haha, tomorrow you'll say "I can't do it today, I'll do it tomorrow" and so on. Change starts today

 

Was pulling your leg

I believe overall you're quite on the right track with your approach. Chatting doesn't compare to face-to-face conversation. TV series don't usually add much value, they steal your time for what I consider to be cheap entertainment.

Picking up more exercise sounds great indeed. I would also add some reading, especially stuff that gives you different perspectives, or makes you think. Add in a hobby or two and you'll not have the time to hit on girls, they'll seek your attention.

In case it gives you food for thought, I go to the gym at 6am and do only 3 exercises: squats, military presses and deadlifts (look for Starting Strength). I read a lot about depression ("running on empty" for example), and watch lectures on philosophy (youtube Wes Cecil, Harvard Justice). As hobby, I picked up again photography.

Not speaking with girls, as a rule, I think it's not healthy, because, apart from sex, they also offer a more emotionally balanced conversation. A coffee here and there to discover the human behind a pretty face, I think does wonders.

Last, general, suggestion is to not do it as a challenge, but rather as a lifestyle change.