You should train hard at least for 1 hour, at least 3x/week. Find a sport that you like and that trains the whole body (swimming, kickboxing, weight lifting etc). I've done all 3 in different periods and currently do weight-lifting (might resume kickoxing too).
Walking and counting steps is not training, is kinda like crawling or barely surviving. You should talk about walking & steps only when you're 80 or something.