You have to get the old tires off the rims, and unseating that bead can be tricky. Putting it on the rim is the easy part. Getting it inflated, and seating the new bead is the problem.
New tires are shipped pressed flat. So it's a fight just to get it expanded enough to even reach both beads. Although there's several ways of doing it, none are as easy as it seems like it should be.
After several attempts, and various methods are used. It's time to finally seat the bead. Unless you have an expensive purpose built air tank, that's built just for this. You have to use something highly flammable. Using a small explosion to supply the needed energy.
Starting fluid is what most people use. It feels very dangerous, and imprecise. I've caught the new tire on fire several times before. Sometimes they just work out easy, usually not. But it does work. A little scary the first time though.
If the tires are delivered fully formed, like they are in the picture, and not like flat, rubber rings, then you're halfway there. And might not need anything more than a simple hookup to a compressor. I'd YouTube it, then go ahead and do it. Because the hard part is mostly done. Probably take a good hour of your time, and It's actually kind of satisfying when it finally pops into place.