GO TO A GYM!
If only once to try out some longer kongs or dashes. Eat shit, land on your head, clip your feet, whatever none of it matters at these places. You really have to put some effort into hurting yourself here.
Alot of purists say you dont NEED to train inside. And you dont. but if you are just starting and really just need to get used to throwing some momentum around this is the best place. How do you get to that point where you can kong picnic tables? You throw yourself and just get used to the flying around in the air and crashing down part. The gym cuts the time in half it takes most people to get this type of feeling down. There is a confidence you get in your "abilities" (whether you thought you had them or not) at these places that can help you get over those "sticking points or plateaus". Makes learning a gapped double kong easier (you def eat it alot learning this outside trust me).
even the beach or famed Sea Wall aint got chit on some nice cushy softness when it comes to landing on your skull/face.
So try it once, atleast!!!!! Just make sure you dont get trapped there, Parkour is still REALLY done outside. This just makes for some easy transitions/progressions.
SF- Acrosports gym training with chris on wednesdays
UCBerkeley Gym monday through thursday- definitely hit me up if you are going ot this...