I don’t have time to do a self study program and they didn’t offer me the option.

when looking at real estate websites, oftentimes I see "offers due by" some datefor example "offers due by may 12"what does this deadline mean?

He says if I pay him full asking, he would provide me with the 20% down payment since we could avoid realtor fees, and make up the rest by paying full asking (he had it appraised), rather than accepting an offer under asking.

I've been in real estate since 2015 and currently offer accounting services to investors.

Seller is an idiot for even accepting your offer.

Any resources you'd recommend I research?

Again, the key thing to look for is not the direct booking site itself, but the level of Integrated messaging, contacts management, and/or third party CRM integration they offer. 

There's nothing better than getting an FHA or conventional offer accepted by an unsuspecting seller, knowing you will have plenty of opportunity to re negotiate once the appraisal comes back.

That's what I do in Detroit and happy to send you some resources if you'd like.

Happy to offer up some more insights if you're interested.