How to build a lugged fork
There are some decent websites where people talk about building composite bikes, and even a couple of answers here. But those are mostly either very simple complete bikes, or aimed at people who know a reasonable amount about framebuilding. The book you found is about steel forks, and has only one chapter that seems relevant to what you're doing, and that chapter is marked "optional" in the ToC.

That design stage is critical though. Bicycles are surprisingly hard to analyse using modelling tools, and the front fork is far from the easiest part of the bike to work on. It's also a part where failures are very likely to result in injury. Those two factors mean that it's not a great part to start experimenting on, especially "start toying with framebuilding".

These days with cheap sensors and high-rate portable data collection units it's not impossible to get at least an approximation of the major forces on a diamond frame bike (because you only need 30 or so channels - 8-10 tubes for the frame, maybe  four for the fork, with tension and torque for each), but you're only getting an approximation. I don't know of public data like this, unfortunately.

Your design is also relatively unusual as far as carbon forks go, it's more an MTB fork with carbon blades. That doesn't mean it can't work, just that no-one else makes one and there may be a reason why (bast case it might be unprofitable, worst case it has bad failure modes). If you're just going to combine OTS tubes with machined lugs it should be simple enough to build one and see, though. That will also avoid most of the mess and complexity of working with composites, and that's good.

In your position I would be very tempted to make another part first and test that to destruction. That way you get to run through the process and get an idea of your abilities and limits, and you get a part to test. Seatstays, for example. When they fail you tend to end up sitting on the ground, rather than using your face as a digging implement. If you threw together an inverted 4 frame with single bar seat/chain stays you'd have a part similar to a front fork, but with safer failure modes.