Which of the following is the best muscular strength plan for somebody who has not exercised in a long time?

Do a few exercises a couple days a week with light weight until the body gets used to a strength routine.
Join a gym and use every machine in the gym to have a balanced strength routine.
Lift as much weight as possible as soon as possible to make up for lost time in strength gains.
Make sure the strength routine is fun and pay attention to proper form and amount of weight later.