As you all know, inline skating is a great alternative exercise that somewhat resembles ice skating, and may get you around faster than walking and jogging. It may be particularly attractive in places where car parking is limited.
It might be a good idea to carry a pack to carry the change between skates and shoes, and if you go into a store, you may have to carry proof of purchase of the pack and skates, so they don't think you stole them from the store.
(I think of inlines as a compact alternative to manual or electric scooters. The problem with scooters, is that they are harder to bring into a store or other building, are often hard to lock to a bike rack, and may be stolen if you don't lock them.)
RollerBlade, a maker of inline skates, has a bunch of videos on Youtube that teach beginning (off-ice) skating technique. E.g.,
Tips For Beginners 1
https://www.youtube.com/watch?v=Uir3ZAxlUnw Tips For Beginners 2
https://www.youtube.com/watch?v=veha896BkDk Urban Skating: Tips For Beginners
https://www.youtube.com/watch?v=8YvgBMW40qME.g., while they teach how to use brakes on the back of some inline skates (one foot forward, one foot back, toe up on back foot to bring brake pad in contact with the surface), they also teach T-stops. These look easier than what a skate shop owner taught me - jumping into a hockey stop. They also teach a set of beginner turns, dealing with bumps, curbs, and debris, etc.
That said, please play it safe. Watch out for traffic, wear protective gear (unlike the people in the video!), and so on. While unprotected falls are possible on concrete and asphalt, they are a harder to master than on the ice. And, unless you skate with the Zamboni, most ice rinks don't force you to skate with heavy motor vehicles, which are common on city streets.
Some people skate in "heel skates" that strap into the back of normal shoes. Does anyone know if they are as difficult to balance and stop as they look?