As others have said, search YouTube for brake pad changes on your make/model of car. If that still leaves you with questions, you can also find a self help book specific to your car (Chilton or Haynes).

Good news, based on how you’re describing your own technical level, I think you’re going to find this is pretty easy actually. Only concern is if you live where they salt the roads, then some of these things will be rusted together. So, good to watch the video again & see how it’s supposed to come apart.

Once the calipers are off, you need to support them somehow so they don’t hang on the brake lines. I usually just slide a cinder block underneath them, but others like using bungie cords / zip ties & tying them to spring/strut. (Depending on the car, you may not even need to fully remove the caliper - many of them pivot upwards).

Probably worth mentioning, the pads themselves are cheap, but you should also resurface or replace the rotors. One of the important steps to making sure they last is having a clean & smooth surface when they’re new, so that they will mate together smoothly. There’s a lot of neat stuff going on with the transfer of pad material to the rotor itself, I can’t pretend to cover it all, but “bedding” the pad material to the rotor properly ensures long life. And the short-short answer is that to accomplish that, you need new rotors or you need to have the rotors machined smooth when you replace the pads. I find it’s usually more cost effective to just buy cheap rotors from Rock Auto online.

Lastly, you may want to watch a video on brake bleeding (getting the air out of the brake lines). In theory you might not need to even open the brake lines, but often you need to do so in order to get the caliper pistons to retract far enough for the new brake pads. (I like to bleed the brakes on every pad change just to have fresh fluid in there). I mention this because brake bleeding is usually a 2 person job. There are special tools to work around that, but you need to know in advance if you’re going to need them.

There’s this scene at the start of War of the Worlds where the hero races his classic muscle car up this tiny neighborhood street at full tilt, exhaust notes at full blast, and I think he even screeches the tires by slamming the brakes pulling into the driveway. Then he walks up to his neighbor and they’re all chill with him. In any other world, the neighbors would have him in handcuffs.