Inspect clutch cable if its cable.
If the cable is dry inside a bit of oil can help. Look at some of the areas where the cable makes a turn it may be worn-out and starting to fray.
As for replacing the clutch, it should be easy as present vehicles.
Only difference would be the shift linkage part. If yours has the links like a 89-91 search the infamous bitch pin removal on Honda civics on you tube. Just a heads up, its called a bitch pin for a reason. Lol
Check you tube videos for a bit more detail.
Basically you want to remove everything mechanical( speedo cable, shift linkage or shifting cables which ever its used)and elctrical( back up light switch, transm ground strap if equiped) from the transm. Before removing the axleshaft facing the rear of the transm(whell hub nut)
Once its removed start removing transm. Bell housing to block bolts.
Again check YT, I'm sure thres a vid for 1st gens. Its a lot of typing to cover everything vs the video. Lol
Idk 1st gens but 89-91 loves clutch sets made by Exedy, even luk or sachs.
I got a stage 1 Exedy for my 90 a few years back on Ebay from gripforceclutches iirc, and its held up well till the head gasket decided to retire. Lol
Which ever brand you choose make sure to get from a reputable store. I remember seing fake exedy clutch sets back then when I was looking to buy mine. just a thought.