Really Really need some advice

I am at my goal weight but really want to reduce my BF%. For a while I was doing some of fitness blender's strength and fat loss routines with weights and did quite enjoy them. I certainly felt I was "working" out when doing them. After reading tons of posts on MFP, I thought I should try to lift heavier at home to get a better shape as I am certainly not entirely happy with the final results of particularly my stomach (however some of my issue is definitely loose skin). I found a dumbbell only routine online at muscleandstrength.com that I have been trying but my problem with that is I am finding it hard to hold on to the dumbbells for some of the moves such as squats and lunges.

I'm not ready to join a gym yet but am wondering if I'm wasting my time with fitnessblender or even the dumbbell routine? Is a heavy lifting program such as stronglifts the only way I will really see results or should I persevere and keep doing the fitnessblender routines which I enjoy? With doing the dumbbell routine I'm losing my motivation because I know I can squat more etc.but find it difficult to hold the dumbbells for a length of time in my hands. I'm currently using 2 at 28lbs each.

Any thoughts or words of advice/support? I know how easily I can give up out of frustration and become totally sedentary again.