So I set up a test account upon @pixelfed & thus far, I like the feel of the web app. Fortunately, I can use the @Mastodon iOS/iPadOS app to login into PixelFed, but I am limited to uploading four photos max (which is the default limit of Mastodon).
When I tried uploading just text, the site expectingly errored out, but a similar issue happened when I tried uploading videos. For now, I think I will use Tumblr for photos/videos.
Just a personal instance of Mastodon that is intended for one person. :-)