Simple: The right investor is someone who wants to invest on standard terms at a good valuation relative to your current stage. Extra bonus points for someone who has relevant industry connections that could accelerate your business and is willing - at the right time - to make introductions for you.

But you should have really quite low expectations of most angel investors. Certainly they should have NO operational control of the business. Although I want to be as helpful as possible to companies I invest in, it's entirely for the entrepreneur to drive me, not the other way around. There are very few exceptions to this rule, for example when angels who actually do have very recent and relevant experience want to back someone who is inexperienced and need oversight in order to feel comfortable investing early. But this is a real rarity.

Finally, to answer your question about what entrepreneurs do when they receive funding, they should spend it in the best possible way to accelerate the success of the business.

I'd be happy to talk to you in a call to provide more clarity on the matter and also discuss when is the right time to accept investment. If you have people willing to back you, that's great. You want to make sure you have a clear plan and set expectations accordingly.