Replacing spark plugs

Yep that is a close fit. Here is a video on a civic but not a hybrid so you can get an idea of what you are in for.

https://youtu.be/2Adcrm-_SG4

Here is a guide to give you generic information.

https://www.2carpros.com/articles/how-to-change-spark-plugs

This is specific information for your car

Torque 18 Nm (13 lb-ft)
Gap 1.0 - 1.1 mm (0.039 - 0.043 in)

Many of these cars will have a special or custom tool to remove the spark plugs. It is a tight fit so hang in there.

Here are diagrams on what it will be like for your car (below)

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken