Hi, congrats on your upcoming HT.
Most people end up having more than one HT to get the desired look and density that they crave for. So when considering a HT you need to keep in mind regarding future loss and the possibility of further HT's.
Regarding playing footie, clinics vary in answers, most say anywhere from 2 weeks to a month. Best to check with the clinic your having your HT with and ask them what they advise.
Wish you all the best,