I started strength training this year (I’m 40). I started StrongLifts 5x5 on Jan 1 and have been consistent with the 3x per week. You start with just an empty bar to focus on form, and build up, 5lbs per exercise per day until it becomes too much and then you slow the progression. It was perfect for building proper form and then building strength. Haven’t been injured yet and I’d recommend it easily to anyone our age who is a beginner. The website is extremely informative and there are lots of YouTube videos to supplement for form cues.