Like myself, you're not a spring chicken. I would highly recommend you get blood tests regularly. That way you have objective data and can stay out of trouble and fix small problems before they become big problems.
FWIW, I have been lifting for 35 plus years and have a successful history of competitive natural bodybuilding before I took anything, including a heavyweight title.
Recently I have beaten every PR I had on a measly 100mg test/wk and I'm 52 yrs old. 500 is heavy to start, and please get bloodwork.