Hi Q-C.

I'm glad that you decided to take up body building which I'm assuming to change your body image, congrats on that. First of all just try to understand that this is a long commitment and not temporary thing where you do it when you convenient and quit when it gets too hard.

Different people have different fat storage and tend to accumulate fat in different places more than the other.

To answer your question:
1. You don't need to take whey protein to lose weight or when you start bodybuilding, better going with whole foods to get your protein needs if its possible, whey protein is just for convenience sake to get in protein. So what you have to do is, set a target calorie to achieve and be accountable for every single thing that enters your mouth. Count the macros/calories in EVERYTHING. That is a way to know and gauge how much calories you're having in a day to day basis and the results might surprise you. After that you can think about catering the calories to the calculated calories required to lose weight.

2. Doesn't really matter now does it? But you can get them from any reputable online sellers MMC, BMF etc just to name a few.

Good luck in your journey bro

I highly agree with this, I read and read and read like literally hundreds of articles and watched hundreds of videos on training, nutrition for like couple of years to fully grasp and adopt the message and yet people around me are like how do you know what to eat? how do you know how much to eat? why do you do that exercise? maybe because I learn and trial and error on myself for years? Sounds more like a rant though haha.