This might be a dumb question but I am concerned as to when you enter the stadium do you then have to go down to get to the 100 sections?

No, you enter at field level. You will need to go up to get to your seats.

U can access almost all sections at ground level

Yes you can walk right in to the 100 level quite easily

No

No, they are slightly higher than the field

Thats right may have to go up to get to your seat depends on your seat number.

No you basically come in at ground level

No, you can access the 100 sections from the ground level.