I'm not sure about all this heavy lifting in menopause, most women l know who do this look very strained and unwell.
I lift heavy and started after menopause, and people always gasp when I tell them my age (I look at least a decade younger).
@RagnarRagnar progressive overload is when you follow a programme - or a pattern of exercise - that increases the load you're lifting progressively - often week by week. But it might also be that you lift, say 5 reps x 5 sets of deadlifts at a bit below your training max one week, then the next week you ascend to go over your training max, and do fewer reps in each set. And so on.
(Training max is the amount you can do in the different lifts - deadlift, squat, bench - any day no matter how strong you're feeling - challenging but not exhausting, IYSWIM)
The other thing you can do is to train to failure. So last week I was doing 54 kilo lat pull downs, and the aim in each set was to do as many as I could manage at a regular tempo, and with good form. 5 sets, with a diminishing number of reps! First set, I could get 11 reps. 2nd set I managed 9 reps, couldn't get the 10th below my chin. And so on.
And you do need to stretch. Some basic stretches of leg muscles, hips, and shoulder girdle, to start you off. Also try foam rolling. Hurts like hell at first but you can tell it loosens you up as you keep doing it.