Good for you. My weights have gone dormant this past little while but as soon as I make a full transition into retirement I'm back at it. Keep in mind that I'm closing in on 70 within a few years so my advice will be biased towards the life enhancement, not athletic performance at this point. If you are looking for the latter scratch what I'm about to say.
Don't pick a few favorite exercises and do them ad nauseum. Keep sets to a minimum (three or less......I'd pick two) and do more exercises.
Balance antagonistic muscle groups ( quads/hamstrings, biceps/triceps, front/back torso) . Don't over strengthen one at the cost of the other.
Having said the above, I might suggest that life often causes an imbalance towards the front of the body, so the posterior chain is going to need a little more work. Working show muscles is fun, but counter productive for a healthy body if that's all you do. Our bodies tend to curl as we age. Working the upper back, glutes, hamstrings and calves will pay big dividends on life enhancement.
After a life time of bench pressing......I'd suggest you pass on this one. It's hard on shoulders and causes the pecs to pull you forward. I have titanium in one shoulder and have some pain in the other, and while sports and surgeries played a part, so did bench pressing.
Forget about impressing anyone. Save just a little gas in the tank on most workouts. You can max out occasionally if you wish, but I don't see the benefit of doing it more than rarely.....if at all. I worked out to failure often in the past.....not any more.
Make strength training only a part of your triad. Some aerobic exercise (in moderation) and mobility/stretching should cover the other two legs of your training. I've over looked the latter, and while I'm working to regain some of it, it would have been much easier, and healthier, if I had been stretching all along.
Accentuate the eccentric part of the exercise. You can lift the weight quicker (depending on your age you can even move very rapidly), but lower it as slowly as you are comfortable doing. It's harder work, but it pays bigger dividends.
Have fun doing it. If it becomes a chore, it will go the way of most chores...…….only doing them when you have to

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Good luck, and work into it gradually.