You might find a sweet spot with tech mods. When there's an established hierarchy or crafting automation you plainly must do, it becomes a lot more engaging and you can usually focus on one mod at a time. For example, Mekanism asks you to stack factories upon factories to progress, and AE2 makes that a lot more simpler. I get the crafting and storage mods first before I focus on other mods, personally. That's what gets my ADHD fix on.