You are not only doing it absolutely right, that's hugging inspiring right there.
Well to be clear, what I've been doing all year has been high rep, low weight. Initially, I felt like I was cheating, but I can say this: I'm far, far trimmer and look better with my shirt off than I ever have before. If I wasn't so self conscious about my physique still and publishing a shirtless photo on a public forum, I'd show how I looked on 1/2014 compared to today. So if anyone is struggling, I'd recommend you give serious consideration to high rep, low weight routines. I do everything at home.
I've used 2-20 pound dumbbells for most chest press/bicep, shoulder press sets. Usually, I try to get in 25-30 reps per set, every so often (if its a chest press only day) I'll do one set of 50 to start and work my way down (maybe my next set is 40, then 35, etc).
For other exercises, like shoulder cuff stuff, butterfly, back, I've used 2-5 pound dumbbells. The exception is some specific moves I do with a 15 pound kettlebell.
Recently, I added 2-25 pound and 2-10 dumbbells to my lineup, basically bumping up everything to the next level. Started doing 1-25 dumbbell for triceps (I think the specific move is called skullsmahers?)
Between each set, I walk for 200 steps (95% of the time, sometimes, if its a full upper body day and I'm needing to get the last few exercises in quickly I'll do only 50 steps).
A really beneficial thing I've found is to calculate the total weight I've lifted that day. While I don't always do it, on days where I'm aiming to push myself a bit more I will. I just take the total number of reps x whatever the weights I used were. My record was 13,000 pound day on Dec 13. I can really only set records on chest press days, so doing the math that was probably 325 reps x 40 pounds (2-20 pound dumb bells).
"Someone once told me that Time is a predator that stalked us all our lives, but I'd rather believe that Time is a companion who goes with us on the journey, and reminds us to cherish every moment -- because they'll never come again."