How can I install/remove ceiling lights from the attic?
The real practical solution to this issue is to acquire a long reach light bulb changing pole. These come in a variety of styles and extendable lengths. The particular type of bulbs that you intend to replace will determine the type of pole that you select.

It is always safer to be standing on solid ground with an extension pole than to try to balance on the top of a ladder. And if you follow my suggestion there will be no need to enter your attic and be changing out any fixtures.

Google Images with the phrase "long reach light bulb changer"  will show you all the options rather than me posting a plethora of pictures here.