Markus,
Well done on making progress and educating yourself. When reaching out to other investors, be careful
The conversations you are having could be tainting the waters. Less likely when you do not have a deal into which they can invest now. If you are over the line, you might have to avoid any investments with the individuals until some time has passed. To demonstrate that you did not take part in an illegal solicitation.
Second, if they are not accredited, you may be looking at dead-ends. Working with investors are not accredited requires things you do not presently have. SEC filings, etc.
Third, some might call it a JV. A JV can very easily be a securities offering even though you spelled it JV. More so if you expect more than 1 investor to passively invest (pooling funds). While people think you can avoid syndication by labelling stuff a JV, it could still be a crime. Ignorance of the law is not a valid defence.
Lawyers who contribute here on BP will reference the Howey Test. See below.
Howey Test: https://www.investopedia.com/terms/h/howey-test.asp
The Howey Test determines that a transaction represents an investment contract if "a person invests his money in a common enterprise and is led to expect profits solely from the efforts of the promoter or a third party,"
The link goes to a longer explanation. Investopedia is like Wikipedia for investors.