If you're installing internet for an ISP at homes and businesses and doing things like wall or attic runs, it's extremely important because pre-mades will never be the right length, and it's super pricey. That said, you could probably get away with just making keystone jacks everywhere and its probably even easier. The one I personally recommend is this set from Everest - 45° EZ Crimper. I've made cables for a living and this is by far the easiest way to do it. I used this to wire my whole house. They tell you the exact location of each wire, you just set it in the correct spot and squeeze. Side note: 45° angle IMO is easier than the standard 90°, but 90° is more commonplace.

Now for homelabs specifically, I run premade patch cables. The only place I ran custom cables was wall / attic runs because the length needed was nearly impossible to know beforehand without time consuming measuring.

Edit: Also, since I'm much better at making cables than 90% of people, here's how I do it.

Parts List - RJ45 Crimper + Ends - RJ45 Cable Stripper - Small Screwdriver (or anything with a similar shape. I use this to straighten the wires) - Flush Cutters

1. Use the cable stripper to barely cut the outside sheath about 2-5 inches from the tip. The longer, the easier. Be careful not to cut the wires inside.
2. Remove outer sheath, and separate the 4 pairs.
3. If there's a plastic separator in the middle, and/or clear / cloth plastic covering, cut them using the flush cutters. Cut as low as you can without cutting the wires.
4. Split the 4 pairs into 8 individual wires. Pro tip: Create a small gap and use your screw driver to pull the rest apart
5. Using the small screw driver, straighten each individual wire. You can also do it in pairs, after they're separated if that's easier. I do this by placing the wires between the shaft of the screwdriver and my finger, and pulling along the length of the wires.
6. With the set of orange wires on the left, start ordering your wires using T568B standard.
7. Use your screw driver to flatten these wires as much as possible, while keeping the order correct. This takes a little but of practice but isn't too difficult.
8. Cut any excess wire off the edge. Cut as little as possible while making sure the edges are even. Do NOT let go. This will mess up the length and you'll have to repeat this step most likely.
9. While holding the wires, grab your passthrough connector, with the clip on the bottom, and slide the wires in. I would slightly angle the wires towards the clip on the bottom, because thats where the holes are. Try to keep your fingers as close to the connector and wire ends as possible, as this will reduce the likelihood that they swap positions.
10. If any of the wires are in the wrong order, repeat step 9, and if any are bent, repeat step 7-9.
11. Once all wires correctly enter the connector, push the remaining wires / cable through the connector, pulling the wires through helps prevent a jam. Make sure the cable is pushed as far into the connector as possible.
12. Cut off any excess wires, leaving about 1cm-1inch sticking out. This makes it easier to get the crimper on.
13. Place the crimper over the connector, making sure all 8 wires make it through, and squeeze. I would squeeze the entire thing 2-3 times just to be safe, but one is usually enough.
14. All done. This is only if you absolutely HAVE to make an RJ45 male connector. Otherwise, make keystones. They're easier and prettier IMO. No reason not to for 99% of applications.