Ok first point, dietary suppliments are exactly that, suppliments for diet lacking in something. I don't know where you live but most of the western world especially US and UK diet is high in fat, sugar and protein meaning that getting balance will not involve adding protien for you to urinate out or have stord as lipoprotien (fat).
Try not to only train a few areas of your body in isolation but work everything using recognised plans. If you train only your abs and no other core muscle you will end up with back issues and terrible posture, making you look and feel dreadful.
As someone new to training go for some simple compund movements like deadlifts, press from bench, bent over dumbell rows etc. and look on line for videos of good technique. These will work everything including your chest and abs.
Start off light and get the technique perfect. To increase intensity without increasing weight you can do continous circuits meaning no rest, but your body should still be strong enough to perform everything safely. Only when you are sure you have the technique spot on should you increase weights and when you have the weight will come rapidly.
First and foremost find stuff you enjoy. I love weight training, but only the higher intensity end where I feel ready to die, being moderate for a few months after a break years ago almost killed me, and I could only do it because I knew this was a route to my preferred training. If you find it's more fun to do bodyweight work and weight in fast moving circuits do it, if you want to go for power, start sensibly but do it. Failing to adhere to this often leads to failure because without motivation you will not train and enjoyment is the best motivation.
