Mastodon and accessibility

I've been a bit of a whiny mess regarding Mastodon. I'd like to be part of it, but I use the web interface on a laptop, and there is no control over appearance (except I think a dark/light option). The font size is incredibly small, and can't be changed. And responses to pleas for help have been that I should use an app on my phone and quit complaining, which makes me feel SO welcome (sarcasm).

I've just found Whalebird for Mac. It has font size adjustment, and many color theme options including custom. I still don't love it, and bad feelings linger, but I think it might make Mastodon *possible* for me.

Note: I don't consider myself visually impaired. I can read a standard paperback book. Mastodon is like trying to read the fine print on a contract-- all the time.

Not posting a link because I'm not happy with my current choice.