Starting out with Arduino - beginner kits
Pick a project, and buy what you need to buy to accomplish it, with spares of everything for when you screw up. Repeat this for each project.  Eventually you'll build an inventory of stuff you use most. If you go with a big kit, there will still be things you'll need to order to complete a project.  It's not the cost of the components that will get you --- its the process of forming an order, paying for shipping, and waiting for what you need that will be most annoying, and then doing it again when you forget something.