This is a guide meant for total beginners, whose priority is(should be) learning the proper form before they start seriously training. NOTE:THIS IS NOT A PERMANENT ROUTINE, YOU SHOULD CHANGE TO SOMETHING BETTER ONCE YOU ARE EXPERIENCED ENOUGH.
Good video to watch:
https://www.youtube.com/watch?v=XIYuxAeKSM0The routine I recommend for beginners is what Noel Deyzel suggests in the video above, a 3 day upper body/lower body split with simple exercises. What does that mean? It means you do an upper body training session on one day, then rest(no weight training) one day, then lower body one day, then rest, then upper body one day. Essentially, you train 3 days a week on an "every other day" basis, alternating the type of exercise with every training session. This routine should be used for your first few weeks until you feel comfortable enough with the basics, at which point you move on to the one below.
A basic push/pull/legs split: train push once a week(chest, shoulders, triceps), pull once a week(upper back muscles, lower back, biceps) and legs once a week(quadriceps, calves, glutes, hamstrings), for a total of three days a week. Some people might say training 6 days a week is better, but an "every other day" routine is probably better for people who have only been training a few weeks as 6 days may be too much strain and time investment.
In this thread I will add guides for 2 sets of simple exercises to start off with for the first few weeks of upper body/lower body, then 3 sets of exercises for push/pull/legs. I will also add video guides for the individual exercise, so (You) can learn how to keep the proper form and avoid injuring yourself.
I warn you, however, that solely using online resources to learn these exercises can be dangerous, especially if you ever want to start lifting heavier weights. If you have the money/your parents are willing to spend the money, I recommend getting a personal trainer, as they will be able to watch you, make sure you don't break something, give personalized advice, and greatly speed up your progress. If you can't get one, then don't try to lift more than 100 pounds or so unless you have near-perfect form. If you lift more than that, don't lift weights that are heavy for you(you can do less than 5 repetitions or so) without having a buddy to spot.