The 2007 Subaru Impreza 2.5i is a moderately easy vehicle to maintain, and is recommended to someone capable of simple vehicle maintenance. Changing the engine air filter is no problem, as you only have to disengage a few fasteners for access to the filter. These fasteners are easy to disengage. The components of the spare tire are easily accessible in the rear of the vehicle. This keeps the tire and jack kit ready to go in case of emergency. The brake fluid reservoir is easily visible in the engine bay. This will make it easy to check and replenish the fluid level on a regular basis.
Some things are more problematic on the 2007 Subaru Impreza 2.5i. Removing the fog light with reliability can be a bit complicated. You will have to remove many different components of the fog light housing in order to remove the housing itself for access. To access the headlight on one side, you will have to remove an air intake. This will require some tools to complete. Changing the cabin air filter can be tough, as you will have to completely remove the glove box for access. This will require many steps to complete.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.