New investor, Need help understanding the lending process

[Edy Lagares]

So my goal is to find a multi family (2-4 units) property and house hack.

I applied for my first loan ever and got pre-approved for $250,000 but I don't know what to do next.

I guess, I want to know if after all this effort, giving all these documents and information, is it ok to say no if I think it's not a good deal?

Being that this is my first loan and my credit score is not great, What should be a good deal? What should I watch for? 

Can I try to get another loan on top of this one if I want to get something that is more expensive?

He said I can't borrow for my Down payment, is that true?

What questions should I ask the lender?

I appreciate any help I can get on this. 

This is exciting and scary at the same time, I guess that's how's supposed to be?

[Ben Feder]

@Edy Lagares welcome to BP! I'd love to have answers to some of these questions as well and I'm also new to investing. Best of luck on getting the information you're looking for and in your journey overall.