Help find working method to circumvent Internet shutdown method in Russia!

Why? What difference between connection directly to Tor bridge and connection to Tor over VPN? Why with the last variant your ISP can get more info about your connection than when you connect to Tor directly through your ISP? On the contrary - people use a VPN before Tor to hide the fact of connection to Tor and the details of this connection. Yeah I heard that it’s better to use just bridge instead of VPN, if you can, but why connection through VPN is more dangerous than direct connection to Tor over your ISP?