With regards to air pressure and isobars, if you want to do some basic forecasting as well, then the 500-millibar chart is something that should be examined. Historically (pre-satellite downloading via Iridium and Predict Wind) sailors/mariners would use them to help see what's coming for voyage planning:
As a follow-up, if you're wondering why, 500mb is roughly 5700m/18kft above ground level in the US - not quite jet stream level (200-300mb) - but high enough to give insight into large scale patterns that drive surface patterns.
Where surface features are more localized and near-term, 500mb analysis gives you insight into whether there is broad zonal flow, a deepening upper trough, and all sorts of important information about how things on a larger scale can play out in the longer term. They're sometimes called "steering winds", because they're the primary component that dictates direction and speed of storms.
Be careful of the source of your station report. In the US, station report pressures related to aviation are in units of "inches mercury" ("Hg) with the preceding 2 or 3 omitted. Here is a resource: https://aviationweather.gov/metar
In the grand scheme of weather, it does not make much difference, as the change in pressure in time or location is more important than the units.