Thread: Advice needed please.

Hi I am new here and would welcome some help with the following situation.
I was so fortunate recently, about a month ago, to home a lovely Tortie Main Coon who is called Maisie. You will gather she is a girl, no,a lady indeed a Diva.!
Though having done the rounds of Cat shows or maybe because of it she hates cats which is why the previous owner, a breeder, needed to have her rehomed.
I got an enclosure built for her outside which measures around 15x 15 feet and is connected to a roofed enclosure 20 x 8 ft. Maisie spends most of the day inside with me but I feel cats need to experience the great outdoors and fresh air for some hours during the day.
Anyway the enclosure is not attached to the house so yesterday I took her down to the new surroundings. There was much mewing and chirping. I sat in the outside area and out she came for a look around. She seemed nervy of sounds even the birds! I live in the country but tractors and other farm machinery do go up and down the road outside and she was very aware of that noise.
When I left the enclosure the mewing re-started , sort of 'rescue me'.
today was better and she had a good walk around, again with me as company. I did leave her alone for a while .
So my query, eventually , is do you think I am approaching the matter of getting her used to outdoors in the correct manner. Should I perhaps stay with her all the time when outside
for some weeks? The enclosure is extremely well built and family have said it would prevent a lion from escaping! I have started planting cat friendly plants in it, and she has toys to play with. I want to make sure she is as happy as possible. Thank you.