I spend more time stretching and doing cardio at the gym than doing reps but when I do a full workout (2X a week) it is a circuit that a trainer put together for me. I suggest starting out with such a circuit at your gym.
I make a better lineman that a WR so I wanted to be leaner and not as bulky. I do a lot of reps without the straining, burning reps at the end and I don't pay attn to weight just that it has a good resistance.
I hit the gym for a full workout 2 days a week and work the other 5 with medicine balls and stretching for what seems to be forever, using them for resistance and then hear for the old trustworthy Arc machine for a 15 minute cycle. I go back and stretch again with the balls or sometimes I will jump on a machine and do abs or curls just whatever I am in the mood for.
Stretching using a big ass (30Lb) medicine ball is a lot better for building core strength than one might expect.
Buy buying a couple of balls you can get a good core and balance workout at home anytime. See the basic section at the bottom.
https://greatist.com/fitness/25-must-try-medicine-ball-exercises