It helps a lot. Someone would need to go through the effort of tracking your VPN service and correlating that to you.
OP seems to worry about their ISP, and their ISP can’t see anything at the VPN, so they’d need to go out of their way to gather that info. So as long as OP trusts the VPN, they’re probably fine from everyone but state actors and well funded private investigators.
If you want to go beyond that, Tor is your next option. That should be effective against all but the most determined state actors.