If you can afford it, bootstrap in the early days. Next step for me personally would be Angels to get at least a few hundred '000 to scale the business. Once the proof points are there, and your start-up is able to tangibly demonstrate the trending up on your revenue chart, then you've got strong financial metrics to go to VCs for the next growth phase.
@oglen Glen, bootstrapping is painful
That said it is by far the best approach in the early days. I’ll go as far as to say founders should avoid VCs completely
Angels, grants, cashflow, side gigs. Anything but VCs unless it’s absolutely necessary