I read this really long article that describes the intricacies involved in soliciting investments as a US company. Here's the article https://www.newburnlaw.com/securities-implications-with-soliciting-investors

It's not just for Delaware startups as a whole, it's for U.S registered startups. This is just one of the 100 reasons why this startup registration thing needs to be done with trusted companies who have security law experts to advise you.

Please can you recommend trusted companies that can help you register in Delaware and give you solid advice?

Sure, you can check out norebase.com. The process is seamless and can be done online. It costs about $450. They also have lawyers just in case you need advice

Here's the registration process https://blog.norebase.com/register-your-company-in-the-u-s-in-5-easy-steps/