I have a similar device Intel atom, 1gb RAM. I installed arch and use it as a headless computer (without DE/WM). If I need WM I use sway. Use a minimal browser like Qutebrowser. Although it would also run like shit but better than chrome/firefox.

It is merged in 6.10 which is about to be released on Sunday (14 July)

Probably Yes

I was using Atkinson Hyperlegible font for ease of readability. By disabiling this font, this issue is fixed. Thanks for help.