Investors invest for returns, not ideas.
While a great idea is important, great execution is far more important.
You need to be able to communicate your long term vision clearly to your investors, and present it in a way that includes their long term incentives as well (how will they get returns?)
There are many places you can find investors:
- Friends, Family, and "Fools" (basically people close to you who will support you)
- Angel syndicates / angel communities (they are both online and offline)
- Online platforms like Angel.co, LinkedIn, BEAMSTART
- Crowdfunding platforms
- List your startup in online directories focused on fundraising
- Referrals of clients/friends/other investors
The key is to get a few smaller investors in who can support you in finding more investors.