Hi Andreas,
While I can't understand why you should want to avoid the cultural delights of Liverpool, and travel from Heysham (which has absolutely no known features of interest), it is possible for you to do so. The Isle of Man Steam Packet Company runs a regular ferry service which can be booked online here The Isle of Man Steam Packet Company in the cyber age!, but the Seacat® service (=hydrofoil high-speed ship) only runs on the Liverpool-Douglas route, not via Heysham.
If you do change your mind and decide to pass through Liverpool it would be nice to see you again.
Matthew