Advice on Validation via Landing Page for First Time Indie Hacker

Hi.

It's my first time building a SaaS business and I'm not sure how can validation happen through a landing page before you even start actually building, but I saw this advice a lot so I just did it. I came up with the best thing I could think of for a landing page of a product that does not exist yet.

I'm building a platform to help administrators and project managers design, track, and automate their organizations' internal procedures in an easy to understand and efficient way.

It's called ProProcess App.

I added some mockups, a video, some features and CTAs to join a waiting list or schedule a meeting.

I would like to hear your advice on what should I expect? How do I measure the market fit from my landing page? And if there are any changes that I need to make to the landing page?

You can check out the landing page here: https://proprocess.app/