I would suggest the following
a. assess your need of the finance required for minimum salable product. this is some thing which you got to get to complete the product.
based on the need either you can go for debt financing or convertible notes with fixed time of maturity. You got to prepare your sales pitch even for getting the loan - interms of projected sales and revenue flow statements
If your minimum viable product ( MVP) can generate income go for it as it will help you for further investment needed eg: enhancements etc
Approach a Angel if first two does not take you to the level you want to reach with out much dilution of your stakes
Even in Agel funding have hard negotiation on how much you are willing to dilute and what phases? usually we need different group of people we approach for different stages of funding.
Final answer is Yes you need to dilute your stake if you want money. Do it more carefully