Hi there...
When I read your post, it brought back memories of my early sobriety.
I too felt the same way. I wondered if I would ever have the energy, the stamina, the motivation to accomplish what I had, at times while drinking.
Toward the end of my drinking career instead of energizing me, alcohol sedated me.
That is the way this disease works.
So, for now, go fishing, do whatever you would like, just don't drink.
Time will help your healing. Eventually the energy and the motivation will return. Maybe not at the superman strength it was before, but at a normal, sober human level.
Enjoy your time fishing.