How do I bypass block from ISP

Maybe, depending on how your ISP blocks websites. If 

curl --resolve medium.com:443:162.159.152.4 https://medium.com/humans.txt

result in a lines of text ending with

security@medium.com                — Responsible disclosures

then you can just DoH (on your NextDNS dashboard, use the Setup Guide for Browsers) or DoT (if you're using Android, use the Private DNS setting from the dashboard), for Apple device see https://apple.nextdns.io/.

If not, use Cloudflare Warp instead. Using Intra on Android works in *some* ISP, but this is just a side effect of how Intra encodes the SNI, not due to how NextDNS itself work (ie, you can point any DoH address to it).

If they are blocking by IP address (using a firewall), you’d be better off using a VPN.