They usually require startups to demonstrate some recurring revenue.
Incubators focus generally on startups that are very early stage and show little to no recurring revenue. They provide a workspace and can charge monthly fees for using their services.
Coworking Spaces
Coworking spaces charge either a flat monthly fee or offer pay-by-the-hour formulas. They offer you a desk, wifi, access to meeting rooms, use of print/copy/fax machines, coffee & vending machines, storage lockers, kitchen, lounge/chill-out area etc. They are usually quiet but sometimes rent private offices within the coworking space so that you can work and talk with your colleagues.
https://hbr.org/2015/05/why-people-thrive-in-coworking-spaces
We will cover how to raise money later on in this course.
If you want to know a bit more about angel investors:
20 Things All Entrepreneurs Should Know About Angel Investors
https://www.forbes.com/sites/allbusiness/2015/02/05/20-things-all-entrepreneurs-should-know-about-angel-investors/#78a3ac92c1aa
Find out about the public funding available in your country.
You can obtain funding against equity, and you can borrow at special rates.
Click here: https://ec.europa.eu/programmes/horizon2020/en/what-horizon-2020
Note: This is a European initiative and just an example. You can find many more.