“One thing I am doing for exercise is using a push mower on my lawn.”
Theres a start.
But you don’t have to join a gym to weight train.
Start with cheap dumbbells, leverage body weight, buy a book and do it at home.
I NEVER go to “the gym”. I have free weights, stationary bike and bicycles at home.
I find gyms inconvenient, dirty and pretentious.
Depends on personal preference. I much prefer the gym. I can always find a spotter and the sound of the plates clanking always fires me up.
I hate gyms too...and bikes. Push ups, planks s/b good...and power walking and our huge yard...but I have back issues that keep me from lifting anything much over 10 lbs...