I think Clutch might be bad

I have a 2000 Sonoma standard. I think the clutch might be going bad because I will push the clutch all the way to the floor and it is still hard to get it in gear. Its weird because before this started happeing I use to be able to just barely push the clutch in and I would be able to slide into the next gear. Right now I have to really push it into the next gear with the clutch all the way to the floor. I was wondering if anyone could tell me if these are signs of a clutch going bad or if its something else. Thanks in advance.

Check the hydraulic cylinder for the clutch, under the hood on the firewall, for proper fluid level.

Check the hydraulic cylinder for the clutch, under the hood on the firewall, for proper fluid level.
I don't mean to sound like an idiot but how do you go about doing that, I'm not going to lie I really don't know that much about vehicles. Could you be more specific please? Thanks in advance.

Just to the r/s of the brake master should be a small cylinder with an cap on it that is the fluid reservoir for the clutch cylinder, sounds like you may need a pro to look at this for you.