

Disc golf.
Discs cost only $15-20 new, used ones can be only a few bucks, you only need one or a few to play, and most courses are free.
In reality, you keep buying new discs. And a bag to carry them. And more discs. And a bigger bag. Then a home basket. And a net to practice in. And more discs. Then a rack to hold the extra discs you can’t bag…. It adds up!
It definitely takes time. I switched from heel striking to mid foot in my early 20s and it took a year to get a steady cadence for distance running. Sprinting took even longer. Take it slow. Getting used to adjusting your speed yet maintaining the same cadence your legs require (~180spm) can be tricky, but I find it much more efficient.
One thing that helped is making sure all my shoes are zero drop. Walking around all day every day using similar muscles to running really helped build my feet and ankle muscles up.
I have not had a joint related leg injury in the 10 years since I switched. Rolled ankles are a thing of the past. My body instinctively reacts quickly enough to prevent the sprain.