If you arrive at MCO at 8:15 you should be to your resort around 10:00.
Disney aims to have your luggage delivered to your room within 3 hours of your checking in to the resort. What time you land doesn't matter.
What I suggest you do is pack what you need for the first night in your carry-on. Let DME get your checked bags, but tell your resort to have your bags held until the next day. They will do that! Then all you have to do is call down when you want them the next morning and they will bring them to your room.
I would never pick up my checked bags at MCO if I didn't have to. Why spend even more time at the airport? Let Disney handle your bags and get on your way.
ps even if you get your own bags it is always wise to pack for the first night in your carry-on. That way if the airline misdirects your bags, you will still have some of your stuff.