Listen not only is it possible, you WILL have amazing success and largely reverse the aging process and look 10-15 years younger inside of 6 months. Been there done this - even older than you. I put on 16 lbs of lean tissue and lost 50+ lbs of fat and have all my hair and very little grey (no kidding). Lifting will make your natural testos levels soar, you will get denser bone, you will feel wonderful and a lot of the every day aches and pains will go away. Not to mention people will notice you as being somehow different or "special" and will smile at you and respect you more than you can imagine. I have pro athletes run into me in shopping centers and airports who will just strike up a conversation and make you feel like a peer. That never would have happened before I transformed myself.
A vew cautions. It can get you very fatigued though since we tend to over train in a rush to get in shape and over do it. So my advise is focus on nutrition (read everything you can get your hands on), prepare your food with the highest quality things you can buy (fresh produce lean meats, egg whites etc). Nutrition and diet and macronutrient ratios are probably 70% of the equation. Then get in the gym 4 times per week and make it a priority as if your life depended on it (because it does). The other important thing that most forget is REST. Try to keep yourself rested and in a state of low emotional stress on workout days/evenings since that's when you grow new muscle. In fact I use to feed my muscle before bed with a slow absorption protein (casein - cottage cheese 1-2% low fat) so I have aminos available when the GH cycle kicks in a few hours after you sleep.
It can be done and it can be amazing. As a little motivation I can assure you that your confidence levels will soar and younger women will in fact go out of their way to be friendly (we all love a little attention and flirting even when happily married). There are other not so subtle reactions to positive nitrogen synthesis that your wife will thank you for too and it will all just cascade in a positive way to keep you "up" (pun intended) all the time to encourage you to make more progress. There is also an amazing feeling of well being and relaxation that you have to experience to relate too. You will be calmer, less tense and people will love to be around you since you will be uplifting and a "winner" to them.
Good Luck,
OD