Probably ethernet/WiFi driver missing or NameServer not set up correctly.

Try pinging 8.8.8.8, if it works then it is a nameserver problem.

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.

GSI

It is Infinix Hot 30 (Asia only) Link More precisely I bought it for 110 USD :P

I bought my current phone for equivalent of 150 USD this year. I flashed lineage os immediately and without bloatware it is running pretty smooth. I am pretty happy with it.

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.