The 1855 was made by Springfield Armory, not Harper's Ferry. This was the pistol-carbine experiment which did not go well. I have a repo of the pistol, & it is not a real one hand shooter. Sorta bulky & hard to hold up.
However, Harper's Ferry did make the 1805 pistol, which is a handsome piece & is used as the symbol of the Army's MPs. There are several replicas; mine is not well made The lock was completely wrong & I replaced it w/ a new 1805 lock. No makers stamp but has Belgian proofs. It's a bit difficutl to shoot as there are no sights & it is a bit straight stocked for modern shooters. It was designed to point & yank the trigger.
Don't know which pistol you refer to, however I would think as a new shooter you would be happier w/ a Pennsylvania style pistol rather than the clumsy older military pistols.