Hello and welcome to the thread!
It’s not scary once you started- it’s pretty straightforward really.
The US pens are completely different to the UK so I wouldn’t bother with those videos. Just read the instructions a couple of times (in your medication box), and take it step by step when you’re ready to inject. Don’t rush it. It’s painless and easy to do. Top tip is not to worry how much your winding the pen to load the dose. All will become clear when you start.
The preparation you will need to focus on is calculating your calorie allowance, use a TDEE online calculator- it will suggest a number based on your personal info. Use My Fitness pal or similar to track your food and monitor macros.
It’s really important you get enough protein as you can lose muscle mass on this and nutrient deficiency can lead to hair loss and other issues. You should also be thinking about resistance weight training if you don’t already do this as part of your lifestyle (eg 20 min you tube video 3 times a week).
Some people are not tracking food and just restricting intake of calories. Which is fine if you’re confident about nutrition. The advice is to ensure you have a healthy, balanced diet to avoid the adverse effects but also make it more of a sustainable lifestyle change.
eg I have an allowance of 1,470 calories and this is what I ate yesterday
Porridge (215 cal sachet made up with semi milk) coffee
Vegetable soup with thin bagel and butter
Boiled egg
Tangerine
Cups of tea
1/4 roast chicken (breast) with Nando’s marinade, butternut squash, feta cheese, mixed vegetable slaw (cabbages, carrots etc)
Also had a flute of cava to celebrate birthday (swerved the birthday cake!)
Most of my dinners are a lean meat or fish and vegetables. I prioritise getting 100g of protein a day and 5 a day fruit and veg to ensure a healthy diet.
I also take a multivitamin and magnesium supplement- which lots on here are taking. Others also taking electrolytes.
Oh and ensuring you drink lots of water.
Apologies if you already know all this - feel free to ignore if not helpful (but could help someone else reading)