If you have to ask what you should do once you have funding you may want to stick to your corporate job. Real talk

1. Investors do NOT invest in ideas. It does not matter how cool or innovative it is. They don't give a shit. The only way you will get money from investor with an idea is if you have raised capital from them before or you are an industry veteran who has built a track record in the corporate world. The latter is still a tough sell.

2. You need an MVP, Proof of Concept, something tangible to show that you have thought through this and market validation. This will determine based on industry.

3. No one cares for business plans. Seeing is believing. Projections, estimates, it is all bullshit.