I decided yesterday to book a 5 day vacation. Leave in just 8 short days. 
I have never done anything solo, also this will be my first time flying. This is something way outside my comfort zone. I however am determined to have a good time.
Will have 2 maybe 3 days in the parks.
Fly out Monday am and arrive early afternoon. Flight is direct so no connecting flights.
Fly back home Friday early AM, not ideal but the price is right.
Staying offsite right outside Disney Springs. Like across the road from it.
Will have rental car to get around.
Questions I have:
1: Do I buy tickets online(E-ticket) or just buy at Disney Springs the day I arrive? I have an old magic band from my trip last year that I can have the tickets added to.
2: I know I need at least two days, but I don't know and won't know if I need the 3rd day, can I upgrade to the 3rd day in the park before I leave if I decide that I want another day? Not sure if I can do/see all I want in Epcot in a single day or not.
3: Since I am flying, and I do want to do some shopping. What is the best way to get the purchases back home? Is there a place close to Disney Springs that I could ship the stuff back home from? This way I can also avoid the airport security check fun. Will be buying stuff from Basin and really don't want TSA to confiscate or deny anything.
4: The resort does offer a shuttle to the parks, anyone ever use a offsite shuttle? Where do non Disney buses drop off and pick up from? I plan on going to Hollywood Studio's and Epcot. For my resort hopping I plan on just catching the Disney bus from Disney Springs.
5: Since the return flight is early am IE 6AM out of Sandford do I really need to be there 2 hours early to make it through security?

I have never done anything solo, also this will be my first time flying. This is something way outside my comfort zone. I however am determined to have a good time.
Will have 2 maybe 3 days in the parks.
Fly out Monday am and arrive early afternoon. Flight is direct so no connecting flights.
Fly back home Friday early AM, not ideal but the price is right.
Staying offsite right outside Disney Springs. Like across the road from it.
Will have rental car to get around.
Questions I have:
1: Do I buy tickets online(E-ticket) or just buy at Disney Springs the day I arrive? I have an old magic band from my trip last year that I can have the tickets added to.
2: I know I need at least two days, but I don't know and won't know if I need the 3rd day, can I upgrade to the 3rd day in the park before I leave if I decide that I want another day? Not sure if I can do/see all I want in Epcot in a single day or not.
3: Since I am flying, and I do want to do some shopping. What is the best way to get the purchases back home? Is there a place close to Disney Springs that I could ship the stuff back home from? This way I can also avoid the airport security check fun. Will be buying stuff from Basin and really don't want TSA to confiscate or deny anything.
4: The resort does offer a shuttle to the parks, anyone ever use a offsite shuttle? Where do non Disney buses drop off and pick up from? I plan on going to Hollywood Studio's and Epcot. For my resort hopping I plan on just catching the Disney bus from Disney Springs.
5: Since the return flight is early am IE 6AM out of Sandford do I really need to be there 2 hours early to make it through security?