You can start dropshipping with around $800, but honestly, you’ll have to compromise on a lot of things.
First, you can’t spend money on paid courses, you’ll need to rely mostly on free resources.
Second, you probably shouldn’t use shopify. Instead, you can build a website on wordpress to save costs.
You’ll also need to find suppliers on your own and avoid using paid tools, because most tools add extra monthly expenses. Same with Sshopify themes, those costs add up too. If you skip all that, you can save a good amount of money and start with a very low budget.
After that, your main budget will go into marketing. Realistically, you should be able to spend at least $800 on ads, because that’s where most of your money will actually go.