Bummer on the bulbs not fitting.
You mentioned not being handy, but if you are open to the idea, simply change your florescent fixtures to LED ones.
I decided to go a different route and converted all our florescent fixtures to LEDs
HERE. I cut power consumption nearly in half. Just as important to us was the quality of light. We did not like the cold blue florescent look. Then there was the ever common light resonating issue when conditions (whether bulbs or power) were less than perfect. I could have reduced usage further by disabling even more LEDs, but we like a little more light with our dark cherry cabinetry interior. The night lights I added within each are a great addition.
I enjoy doing these kinds of projects but realize they are not for everyone.
If you change your fixtures with new ones, please contact me before throwing away your old florescent ones. I would like to experiment with different LED configurations, but don't want to disturb the work I already did.