How to pursue a relationship?

This is a really random and personal post but it's something I do struggle with. 

I mentioned in a previous blog that there's a guy in getting interested in, and I definitely still want to get to know him better BUT; for if and when the time comes, how does it exactly work? 

I've been in one irl relationship and one situation before and the first relationship just kinda happened. It wasn't a good one though so I'd rather not go about it the same (besides, the current circumstances are very different anyways) 

In the situationship the other party knew very quickly that I was into them and I didn't hide it but didn't also "confess" necessarily. 

Either way, I've only known this current guy for a month so obviously I'm not going to put the tips straight into use right now, but as someone with Autism I find these types of situations hard in general. Should I just be honest and plain? I know that I definitely want to know if the feelings may be mutual before I say anything. What's the smart way to go on about it? 

I also don't want it to be some middle school romance movie like "I kinda like you... I've loved you for a while now" or anything like that 

If someone who knows more about this stuff has tips they're very much appreciated