I had the same issue as you when I started. I did not “suck it up” and focus on training but instead did all my activities at a slower pace to stay in Z1-2. That was a mistake as I ended up doing too much volume out of the gate and was forced to dial it back sooner than I wanted to. Without any previous training to go on it’s hard to get a baseline of how many hours per week is right for you. Sounds like you get out alot outdoors so 3 hours MAY be too low, however it is better to undertrain than overtrain. Try it for a week and see how you feel. If you still feel great then add 30 minutes each week (or 10%). Or maybe start at 4 hours. The recurring theme on this forum is “figure out what works for you”.
The Scotts have said all those percentages of Z1 and Z2 are guidelines. There aren’t numbers to live and die by every week.
Hope my input helps.