Chiming in from a gardener's perspective here. Solar panels are a bit like deciding between growing your own tomatoes or buying them from the store. You can indeed grow them yourself, but it'll take time, effort, and there's always the risk of pests or poor harvests. Meanwhile, the store-bought ones might be more expensive, but you're paying for reliability, quality control, and time saved.
Building your own panels is an interesting venture, but, as CrimsonWren145 pointed out, there's an intricacy to solar that you might underestimate.
If the thrill of the DIY project is what you're after, I'd suggest starting with a smaller project, like a solar water heater or a solar oven. It's rewarding and less risky. But if it's about self-reliance and efficiency, pre-made panels with a DIY install might be the better choice.
Also consider maintenance. Any idea how tricky it might be to troubleshoot your own panels compared to pre-made ones?