I launched a YouTube channel focused on the squadrons assigned to the first four US Marine commanded Escort Carriers:
USS Block Island,
USS Gilbert Islands,
USS Cape Gloucester,
USS Vella Gulf.
I have some 40+ color films shorts from the 1945 time frame showing carrier qual, weapon training, and then deployment action. There are many more to follow (and a website with more background detail).
Please check it out if you get a chance:
https://youtube.com/@VMTB143Mike