As a One-Person Team, I Designed My PH Images in Canva—Feedback?

I’m a solo dev launching my first SaaS—Notetube—and I designed all the gallery visuals myself in Canva 😅. Before launch, I’d really appreciate some candid feedback:

1. Are the images clear in communicating key features?

2. Do they look polished enough, or do they feel too DIY?

3. Any suggestions for small improvements?

Gallery images: Canva

I'm on a tight budget and can’t hire professional designers, so I’m wondering—do PH gallery images need to be perfect to grab attention, or are “good enough” graphics acceptable?

Appreciate any feedback to help make this launch stronger!