Trails zigzag up steep mountains for a reason. Straight up is how people end up turning back.
STILLNESS
STILLNESS
Switchbacks are engineering, not caution. A slope you can keep walking beats a slope you can attack for eleven minutes, and the straight line up the face is where people run out of legs and turn back. Zigzagging covers more ground and is the only version that actually gets anyone to the top.
Cut your plan down to a gradient you could hold on a bad day. Twenty minutes daily beats three hours once, because the three hour version is the one you abandon in week two. Pick the pace you could keep in the rain.
Where would a winding route get you further up?
Free, with nothing to buy inside it.