Graphic designer to create merch mockups for social media

I need an image for a Facebook post, which will show 3 products with my custom designs on it - a hoodie, a t-shirt and a mug.

The image can have all three products placed naturally in one frame, or it can be a stylish collage of 3 separate mockup images.

The primary audience are young males, interested in science and space, so the general style of the image should correspond to this audience.

If you don't have your own mockup templates, you can take them from Placeit, they have some good ones that look natural and suitable for my target audience.

I need it to be done as soon as possible, preferably within 1 day. So the quickest way to do this would be to create 3 separate mockups with each product through Placeit, and then creatively combine them into one collage. Dimensions - for a Facebook post.