You have to keep in mind that your ISP may has a list of Tor Bridges and if you connect one of them, they'l ltag you. In order to hide your Tor usage, you have to use unknown and/or very secret bridge. This Bridge shouldn't be used only by you but it should be used by some other people too but it should be in a group secretly, not an easy task but possible. One can set up an obfs4 bridge on VPS and share it with some friends who won't make it publicly available on Reddit and social networks.
Btw there is a short normal (okayish) WIKI if anyone is interested:
https://gitlab.torproject.org/legacy/trac/-/wikis/doc/TorPlusVPNI'm not really sure what is the emphasis on being tagged. Traffic analysis is possible even if you wrap it within a VPN connection, and if your government is willing to tag a Tor connection, then you should assume that they don't care about the false positives as well. You should assume that you are being watched regardless.
Bridges should only be used to evade but not hide your connections. That is futile against governments with tons of resources to track you down. In that case, then running a private bridge wouldn't be the most cost effective idea.