the california energy commission site is definitely your first stop, but here's the thing - those rebate pages can be confusing because they lump together different programs with different rules. are you looking at the clean cars 4 all program specifically, or are there other state rebates you've heard about? that matters because income caps and vehicle eligibility vary. the funding does dry up, so checking the current balance and your actual qualifications before you start the application process saves a ton of frustration.
once you know which program fits your situation, you'll need to verify you meet the income requirements (they're usually tied to area median income) and that the vehicle you're considering qualifies. some folks don't realize used EVs have different rules than new ones, or that certain models get excluded. one thing that tripped me up when looking into this was realizing the rebate amount changes depending on whether you're trading in an older car, so getting those details straight beforehand means you're not surprised when you apply.
what's your timeline looking like, and do you already have a specific vehicle in mind? that'll help narrow down which program actually works for you.