Everyone's different, but try starting with 2-3 days a week and see how you feel. You want to challenge yourself, but not work so hard that you burn yourself out.
I would seek the advice of a doctor. Were you wearing your tailbone pad while you were playing? A lot of athletes these days don't wear a girdle while playing...
Yes, it's a good idea to cross train. On days between your weightlifting workouts, do cardio to help you reach your fitness and weight loss goals. For example, you might...
I recommend (if using the HD edition) you make 6 militaristic buildings for each of the militaristic units you intend to make the most of. Start doing this in feudal,...