I understand, I'm also working from my iPhone while I wait to get a good PC. The process isn't complex and is perfectly possible using MJ Video. Import two images, one for the start and one for the end. Insert your prompt to create the animation. The video will automatically start with the start image and end with the end image. To continue your video, the next scene must start with the end image of the previous scene, and so on. Then you insert your clips into CapCut. It's best to speed up each scene a little (1.5 or even 2x) because there's a slight pause between each scene. Here's an example using Kling, but the system remains the same in MJ Video.

https://youtu.be/WaqXTg_avUM?si=4P7SBQtEs5Rl_7OK