I have been weight lifting for 32 years. A few pointers to share. Focus on exercises that will give you the greatest enjoyment. Don't be afraid to try new equipment for new results. Look after yourself mentally as well as physically, you will always look amazing and youthfull. Teach others what you learn the planet needs healthy people!
Forget about the macro nutrient. Eat natural foods, not processed foods. Don't eat much but chew well, 50 times in your mouth. Do Not eat four hours before your workout. Do it empty in your stomach so that glcagon will be secreted from pancreas. Exercise is 20% and food volume is 80% for weight loss. Keep your muscles with you by the strength training.
Train a minimum of 3-4 days/week. Mix big muscle groups with smaller ones - ie legs and shoulders one day, chest and biceps another day, back/triceps another day and abs every day. Do sessions of cardio as well 2-3 days a week.
Be consistent with your training routine as well as your diet, have short, medium and long term goals that you want to accomplish e.g be able to lift heavier weights or increase your fitness, then make it not a means to an end but a lifestyle.