Guys who never work out are best off going to a gym, and signing up with a trainer for a dozen lessons. They will set you up with a routine that won't discourage you, and show you how to proprelly set each machine so that it fits "you". They all require adjustment as everyone is a different size. Once you establish this routine, as time goes on you will gradually get stronger and find other exercises that you can combine, delete or change. This way you have a base to work from.
Trying to start exercising by yourself is usually a no win situation, as you and most all people lack the motivation to do this boring half hour to an hour of exercise on a steady diet. If you have a buddy it's easier, but again that almost never works out, because whenever you need to rely on someone, to be someware every day, or 4 times a week for a long period of time, it almost never works out. I was in that business and even family members would drop out leaving the son or brother alone to work out on their own. Family memberships were almost always a joke, the wife would drop out as soon as she began to ache or perspire, then the daughter, by the third month they were all done.
You are better off meeting people who are like you and are striving to improve their health. Most work out partners were made at the club. So just go and sign up for a month, and take 10 or whatever package you decide is for you, and try it. I am sure you have wasted a lot more on less positive things over the years.
Even when I owned a club, I never trained my family or friends,it's like teaching your wife how to drive. You may like it, you may hate it, but this is the best way to find out. Otherwise who is going to tell you if you are doing the exercise right or wrong, too heavy or too light. You can easily hurt yourself and snap a ligament or tendon, sidelining you for 6 months. Do it right and find out if it's for you.