Helltides will give you a good foundation for most general builds. I would suggest selecting and committing to a build and then go from there. YouTube videos will generally have the build in the description for the planner, common build planner sites are maxroll, icy veins, mobalytics. It depends on what your format you’re comfortable with, each has their strengths. I don’t have a PC so I think user friendliness wise I like mobalytics, although I wish it had “last updated” and changelogs like maxroll does, but maxroll on mobile is kinda hard to navigate but doable.
Once you select a build the planner will guide you through what gear/aspects you need, what skills you need, and what glyphs you’ll need to order and sometimes in what order.
I don’t mind playing this way, I know some prefer to make their own builds and figure it out but I like having structure and following a guide.