kick_sprint45
We do all our tempo ( slower runs relative to sprints) on Football and or soccer fields and love working on grass.
Again, I would not focus on timing but it sounds like you need or want to time yourself and I respect that. In fact I love timing and counting my runs, times etc as it supplies me with data to learn more about my training at any given point in time. So if you time your runs keep in mind they are training runs only.
I also understand you not wanting to buy anything but at some point you will reach a point of needing self guidance thru proper information ( I would argue you need regardless of who you work with) or a great coach who guide you.
No one can properly advise you on the weight loss as it pertains to training because you eventually will aim for a weight to strength ratio. One you are far from the end of your growing period, two you just lost an incredible amount of weight and three you are only just beginning some form of regular exercise.
help me here someone I am a bit brain dead at the moment BMI?