I can do 2x10 wall squats before my knees, when doing normal squats, my back hurts after 2 or 3 reps.
If you have not already, then take a look at
exrx for the squat motion.
One thing that is difficult with this is that it does not show clearly the lower back which should be curved inwards towards the stomach (think standing strait up, shoulders back, chest out, your lower back naturally curves in towards your stomach. If you curve your back out like a hump then you are compressing the inside edge of the vertebrae whilst opening the outside edge (i.e. the skin side of the spine) with heavy weight which could lead to pinching a disc or forcing it out of position. On standing up again the vertebrae will even out and if the disc has been forced out of position due to the pressure you run the risk of trapping / damaging it.
I have had a slipped disc from dragging a bag of sand with one arm at an angle with a hunched back and it was very painful for around 3 months. The only relief I got was from hanging by my arms between two chairs (dips start position). Every other position hurt like hell including lying down. Please don't anyone make my mistake.
The difficulty some people face with squats is rotating their hips so you are more or less moving your stomach towards / between your thighs whilst your knees are moving over your feet and your nipples are above your knees. The curve in your lower back will help keep shoulders back and your head naturally almost facing directly forward (a little down). Once you get the hang of the hip rotation the movement becomes very natural, almost like folding concertina paper.
Do it clean (no weight) first with arms out in front to get the hang of the movement then try with a clean (empty) bar.
Bar should be just down from the neck, on the ridge of muscle that pops out when you rotate your shoulders to be able to hold the bar. Some people use foam protectors on the bar to help with the discomfort but as advised by some helpful souls here, give it a week or two with the bar alone and the discomfort goes. I did have the bar mark on my back for a couple of hours after finishing the squats though

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I am sure others will advise with more detail if needed.
As for eggs, people here have Kaya toast and eggs which are very soft boiled and usually mixed with a little soya sauce. The whites are only half white and this is very common. I can only eat them by dipping the toast in as eating them like that straight out the bowl is a little too undercooked for me.
Poached, scrambled or fried in a non-stick pan without oil are also good. Tofu (bean curd) is great for protein but is a little tasteless. People here have it with a light sugar water for breakfast sometimes.
Cheers
RB