Mounting & dismounting are an fundamental skills. Stopping & navigating hazards safely has a dependency on being able to quickly & instinctively mount and dismount from a Penny-Farthing.
Until you’ve mastered this skill and can do it reflexively, you shouldn’t cycle on public roads.
When practicing, do so in an area as flat & level as possible and affords sufficient distance to hop along as you mount the Penney-Farthing and also allow you sufficient distance to dismount.
Although a park might seem the best place to practice required Penny-Farthing skills, unleashed dogs are common in parks and as a beginner you probably don’t want to add to this to the mix of things you have to worry about. Also, don’t choose a location near a blind juncture where you have no forewarning of approaching vehicles.
The below videos illustrate- using a UDC brand Penny-Farthing- the mount technique in close detail to enable you to see how the feet & legs need to move. The first video is a very quick HowTo and the second- longer- video goes into all the granular detail about clothing, suitable location and technique of mounting & dismounting with front and rear views of the procedure.