Is it safe to jump start my own car, or should I call someone?

I always thought jump starting a car was one of those things everyone just knows how to do, but last Sunday I found out I do not. My 2017 Hyundai Tucson would not start in the morning when I was already late for a family lunch. I got the clicking sound, and the lights on the dash looked very weak. My brother in law came over with a set of jumper cables and tried to help, but we both stood there looking at the two batteries and arguing about which cable goes first. In the end we stopped, because neither of us wanted to make a mistake and burn something. Later a friend told me that expert jump start help in Umm Suqeim is easy to find and many people just call for it instead of doing it themselves. I never knew that was a normal thing to do. I read a page about jump start service online afterwards, only to learn the basics, and it explained the order of the cables and why the last clamp should go on bare metal and not on the battery. It made sense, but I still felt unsure. So here are my questions for people who have done this before. Is it really that risky for a newer car, or is it fine as long as you follow the steps? Can a wrong connection damage the computer, and how often does that really happen? Do you keep jumper cables in your trunk, and are cheap ones okay or do they matter? I also wonder if a small portable jump starter is better than cables, because I saw one at a shop but I was not sure about the quality. After the car starts, how long should I drive before turning it off again? Is ten minutes enough or does it need much more? Another thing is the battery itself. Mine is about three years old, and I park outside in the sun. Should I change it now, or wait until it dies again? What is a fair price for a new one, and is it normal for a shop to test it before selling me a new one? If this happened to you, please tell me what you did, and what you keep in your car now so you are not stuck. Even a small tip will help me a lot. Thanks for reading, and sorry for the long message.