My Saas vivipic is launched, but no idea how to make the growth. Please give me some advice.

Hi,
I'm Bruce from Taiwan. Happy valentines day! I'm the solo founder and CEO of vivipic.com. This is my first Saas project.

Vivipic is an online graphic design tool with many pre-made templates designed specifically for online sellers. We offer templates that fit across all platforms, like Facebook, Instagram, Amazon, Shopify, and many more. The above image shows some example templates for Valentine.

We just launched it recently and we would appreciate any feedback or advice you may have. All feature requests are welcome!

We tried some ads on Facebook, but it doesn't work and no registrations.
Please tell me what's your advice for exposure and growth.
We're designing the new home page to tell more about our main advantages and features.

Here're our features.

1. Template center: By simply selecting a business category, tag, or keyword, you can filter results.
   🔻 Valentine's templates https://vivipic.com/templates?q=Valentine 
   🔻 Sports & outdoors templates https://vivipic.com/templates?q=sports
   🔻 Pet supplies templates https://vivipic.com/templates?q=pet supplies

2. Group design: One design with multiple layouts, such as website banners, square posts, Instagram Story, and more! Exposure to multiple platforms is very important, but it's time-consuming to have all the different design sizes. Vivipic is your solution.

3. Having different-sized designs in one file: In our editor, you can have multiple sizes of designs in the same file. Now you can manage and edit your designs more easily!

4. Design resizing made easy: The design can easily be resized into another layout, for example, transforming a Facebook post into a website banner with just a click.

Thank you in advance.