I have the chain whip and the park FR tool and my wrench.

I put the chain whip on and hold it clockwise. Then I inset my cassette tool into the cassette and then I put on my wrench and turn it counter clockwise. But when I do it's VERY tough to get off.

I just lack the upper body strength right? If thats the case then I'll take it to my local gym and have someone there do it