Is there someway I can get around my ISP’s login portal and go directly to the Internet?

Is this some kind of wireless internet service? 4G, WiMax, etc? If so there probably isn’t a way around it to prevent theft of service. There may be an alternative form of authentication available, but you’ll need to call your ISP to find out.

If you have a Cable, DSL, FIOS connection you shouldn’t need to use a login portal.