From what I see around me, it seems that the older we get the more we become afraid of strength training - older people start to believe that it will do them more harm than good.
That's not the case, and you can do a lot with just bodyweight exercises to get started. Although you cannot reach the ultimate strength outcomes without heavy weights e.g. deadlifts and cleans - you can still achieve enormous benefits by just doing bodyweight exercises. And of course you can do those yourself at home.
Still, access to good equipment at a gym and a trainer, at least initially, is an advantage. Some basic knowledge also helps, and my four principles below will give you a great head start.
Since I was diagnosed at 50 with Type 2 diabetes I've been learning how to do bone-building body-shaping training for people our age. You can too. It's your choice. Walter