Maybe it’s my computer but Upscayl is so slow for me. Could it be my settings?

can anyone help me with sharing the full process they do from generating an image for a poster to listing and selling it. I think i’m at the stage of understanding most things just struggling with how to make the posters and which order to do it all in.

what ai is ideal for travel style posters from everyone’s experience? ideally free, if not a low cost one? struggling to find anything decent that actually generates images at a scalable size without cropping loads of image

i’m new to this and am really struggling. when generating an ai image i then upscale it but when resizing to different aspect ratios it ends up cutting some of the image of everytime. i don’t know what to do to get round this. Is there a way to generate the image so it will be able to be resized to each aspect ratio without cutting any of the image off

does anyone know any good ai platforms they use to generate images for posters that are either free or offer a free trial. I preferably want to test the AI first before getting into a paid monthly subscription.